<informationTable xmlns="http://www.sec.gov/edgar/document/thirteenf/informationtable">		<infoTable>
			<nameOfIssuer>3M CO</nameOfIssuer>
			<titleOfClass>COM</titleOfClass>
			<cusip>88579Y101</cusip>
			<value>60478</value>
			<shrsOrPrnAmt>
				<sshPrnamt>275500</sshPrnamt>
				<sshPrnamtType>SH</sshPrnamtType>
			</shrsOrPrnAmt>
			<putCall>Put</putCall>
			<investmentDiscretion>DFND</investmentDiscretion>
			<otherManager>1</otherManager>
			<votingAuthority>
				<Sole>275500</Sole>
				<Shared>0</Shared>
				<None>0</None>
			</votingAuthority>
		</infoTable>
		<infoTable>
			<nameOfIssuer>ADECOAGRO S A</nameOfIssuer>
			<titleOfClass>COM</titleOfClass>
			<cusip>L00849106</cusip>
			<value>2256</value>
			<shrsOrPrnAmt>
				<sshPrnamt>300000</sshPrnamt>
				<sshPrnamtType>SH</sshPrnamtType>
			</shrsOrPrnAmt>
			<investmentDiscretion>DFND</investmentDiscretion>
			<otherManager>1</otherManager>
			<votingAuthority>
				<Sole>300000</Sole>
				<Shared>0</Shared>
				<None>0</None>
			</votingAuthority>
		</infoTable>
		<infoTable>
			<nameOfIssuer>ADIENT PLC</nameOfIssuer>
			<titleOfClass>ORD SHS</titleOfClass>
			<cusip>G0084W101</cusip>
			<value>40030</value>
			<shrsOrPrnAmt>
				<sshPrnamt>669850</sshPrnamt>
				<sshPrnamtType>SH</sshPrnamtType>
			</shrsOrPrnAmt>
			<investmentDiscretion>DFND</investmentDiscretion>
			<otherManager>1</otherManager>
			<votingAuthority>
				<Sole>669850</Sole>
				<Shared>0</Shared>
				<None>0</None>
			</votingAuthority>
		</infoTable>
		<infoTable>
			<nameOfIssuer>ADMA BIOLOGICS INC</nameOfIssuer>
			<titleOfClass>COM</titleOfClass>
			<cusip>000899104</cusip>
			<value>3703</value>
			<shrsOrPrnAmt>
				<sshPrnamt>805000</sshPrnamt>
				<sshPrnamtType>SH</sshPrnamtType>
			</shrsOrPrnAmt>
			<investmentDiscretion>DFND</investmentDiscretion>
			<otherManager>1</otherManager>
			<votingAuthority>
				<Sole>805000</Sole>
				<Shared>0</Shared>
				<None>0</None>
			</votingAuthority>
		</infoTable>
		<infoTable>
			<nameOfIssuer>ALDEYRA THERAPEUTICS INC</nameOfIssuer>
			<titleOfClass>COM</titleOfClass>
			<cusip>01438T106</cusip>
			<value>7500</value>
			<shrsOrPrnAmt>
				<sshPrnamt>1000000</sshPrnamt>
				<sshPrnamtType>SH</sshPrnamtType>
			</shrsOrPrnAmt>
			<investmentDiscretion>DFND</investmentDiscretion>
			<otherManager>1</otherManager>
			<votingAuthority>
				<Sole>1000000</Sole>
				<Shared>0</Shared>
				<None>0</None>
			</votingAuthority>
		</infoTable>
		<infoTable>
			<nameOfIssuer>ALNYLAM PHARMACEUTICALS INC</nameOfIssuer>
			<titleOfClass>COM</titleOfClass>
			<cusip>02043Q107</cusip>
			<value>22629</value>
			<shrsOrPrnAmt>
				<sshPrnamt>190000</sshPrnamt>
				<sshPrnamtType>SH</sshPrnamtType>
			</shrsOrPrnAmt>
			<investmentDiscretion>DFND</investmentDiscretion>
			<otherManager>1</otherManager>
			<votingAuthority>
				<Sole>190000</Sole>
				<Shared>0</Shared>
				<None>0</None>
			</votingAuthority>
		</infoTable>
		<infoTable>
			<nameOfIssuer>APPLIED GENETIC TECHNOL CORP</nameOfIssuer>
			<titleOfClass>COM</titleOfClass>
			<cusip>03820J100</cusip>
			<value>1155</value>
			<shrsOrPrnAmt>
				<sshPrnamt>300000</sshPrnamt>
				<sshPrnamtType>SH</sshPrnamtType>
			</shrsOrPrnAmt>
			<investmentDiscretion>DFND</investmentDiscretion>
			<otherManager>1</otherManager>
			<votingAuthority>
				<Sole>300000</Sole>
				<Shared>0</Shared>
				<None>0</None>
			</votingAuthority>
		</infoTable>
		<infoTable>
			<nameOfIssuer>ARRAY BIOPHARMA INC</nameOfIssuer>
			<titleOfClass>COM</titleOfClass>
			<cusip>04269X105</cusip>
			<value>7344</value>
			<shrsOrPrnAmt>
				<sshPrnamt>450000</sshPrnamt>
				<sshPrnamtType>SH</sshPrnamtType>
			</shrsOrPrnAmt>
			<investmentDiscretion>DFND</investmentDiscretion>
			<otherManager>1</otherManager>
			<votingAuthority>
				<Sole>450000</Sole>
				<Shared>0</Shared>
				<None>0</None>
			</votingAuthority>
		</infoTable>
		<infoTable>
			<nameOfIssuer>ATLANTIC ACQUISITION CORP</nameOfIssuer>
			<titleOfClass>RIGHT 02/08/2019</titleOfClass>
			<cusip>048206304</cusip>
			<value>133</value>
			<shrsOrPrnAmt>
				<sshPrnamt>270000</sshPrnamt>
				<sshPrnamtType>SH</sshPrnamtType>
			</shrsOrPrnAmt>
			<investmentDiscretion>DFND</investmentDiscretion>
			<otherManager>1</otherManager>
			<votingAuthority>
				<Sole>270000</Sole>
				<Shared>0</Shared>
				<None>0</None>
			</votingAuthority>
		</infoTable>
		<infoTable>
			<nameOfIssuer>AVEO PHARMACEUTICALS INC</nameOfIssuer>
			<titleOfClass>COM</titleOfClass>
			<cusip>053588109</cusip>
			<value>7250</value>
			<shrsOrPrnAmt>
				<sshPrnamt>2500000</sshPrnamt>
				<sshPrnamtType>SH</sshPrnamtType>
			</shrsOrPrnAmt>
			<investmentDiscretion>DFND</investmentDiscretion>
			<otherManager>1</otherManager>
			<votingAuthority>
				<Sole>2500000</Sole>
				<Shared>0</Shared>
				<None>0</None>
			</votingAuthority>
		</infoTable>
		<infoTable>
			<nameOfIssuer>BIG ROCK PARTNERS ACQUISI CO</nameOfIssuer>
			<titleOfClass>RIGHT 12/01/2022</titleOfClass>
			<cusip>089482129</cusip>
			<value>69</value>
			<shrsOrPrnAmt>
				<sshPrnamt>165000</sshPrnamt>
				<sshPrnamtType>SH</sshPrnamtType>
			</shrsOrPrnAmt>
			<investmentDiscretion>DFND</investmentDiscretion>
			<otherManager>1</otherManager>
			<votingAuthority>
				<Sole>165000</Sole>
				<Shared>0</Shared>
				<None>0</None>
			</votingAuthority>
		</infoTable>
		<infoTable>
			<nameOfIssuer>BIG ROCK PARTNERS ACQUISI CO</nameOfIssuer>
			<titleOfClass>*W EXP 12/01/202</titleOfClass>
			<cusip>089482111</cusip>
			<value>37</value>
			<shrsOrPrnAmt>
				<sshPrnamt>82500</sshPrnamt>
				<sshPrnamtType>SH</sshPrnamtType>
			</shrsOrPrnAmt>
			<investmentDiscretion>DFND</investmentDiscretion>
			<otherManager>1</otherManager>
			<votingAuthority>
				<Sole>82500</Sole>
				<Shared>0</Shared>
				<None>0</None>
			</votingAuthority>
		</infoTable>
		<infoTable>
			<nameOfIssuer>BISON CAP ACQUISITION CORP</nameOfIssuer>
			<titleOfClass>RIGHT 03/20/2019</titleOfClass>
			<cusip>G1142P138</cusip>
			<value>50</value>
			<shrsOrPrnAmt>
				<sshPrnamt>100000</sshPrnamt>
				<sshPrnamtType>SH</sshPrnamtType>
			</shrsOrPrnAmt>
			<investmentDiscretion>DFND</investmentDiscretion>
			<otherManager>1</otherManager>
			<votingAuthority>
				<Sole>100000</Sole>
				<Shared>0</Shared>
				<None>0</None>
			</votingAuthority>
		</infoTable>
		<infoTable>
			<nameOfIssuer>BISON CAP ACQUISITION CORP</nameOfIssuer>
			<titleOfClass>*W EXP 06/20/202</titleOfClass>
			<cusip>G1142P112</cusip>
			<value>20</value>
			<shrsOrPrnAmt>
				<sshPrnamt>50000</sshPrnamt>
				<sshPrnamtType>SH</sshPrnamtType>
			</shrsOrPrnAmt>
			<investmentDiscretion>DFND</investmentDiscretion>
			<otherManager>1</otherManager>
			<votingAuthority>
				<Sole>50000</Sole>
				<Shared>0</Shared>
				<None>0</None>
			</votingAuthority>
		</infoTable>
		<infoTable>
			<nameOfIssuer>BLACK RIDGE ACQUISITION CORP</nameOfIssuer>
			<titleOfClass>RIGHT 07/10/2019</titleOfClass>
			<cusip>09216T123</cusip>
			<value>60</value>
			<shrsOrPrnAmt>
				<sshPrnamt>200000</sshPrnamt>
				<sshPrnamtType>SH</sshPrnamtType>
			</shrsOrPrnAmt>
			<investmentDiscretion>DFND</investmentDiscretion>
			<otherManager>1</otherManager>
			<votingAuthority>
				<Sole>200000</Sole>
				<Shared>0</Shared>
				<None>0</None>
			</votingAuthority>
		</infoTable>
		<infoTable>
			<nameOfIssuer>BLACK RIDGE ACQUISITION CORP</nameOfIssuer>
			<titleOfClass>*W EXP 07/10/202</titleOfClass>
			<cusip>09216T115</cusip>
			<value>280</value>
			<shrsOrPrnAmt>
				<sshPrnamt>700000</sshPrnamt>
				<sshPrnamtType>SH</sshPrnamtType>
			</shrsOrPrnAmt>
			<investmentDiscretion>DFND</investmentDiscretion>
			<otherManager>1</otherManager>
			<votingAuthority>
				<Sole>700000</Sole>
				<Shared>0</Shared>
				<None>0</None>
			</votingAuthority>
		</infoTable>
		<infoTable>
			<nameOfIssuer>BLACKSTONE GROUP L P</nameOfIssuer>
			<titleOfClass>COM UNIT LTD</titleOfClass>
			<cusip>09253U108</cusip>
			<value>5432</value>
			<shrsOrPrnAmt>
				<sshPrnamt>170000</sshPrnamt>
				<sshPrnamtType>SH</sshPrnamtType>
			</shrsOrPrnAmt>
			<investmentDiscretion>DFND</investmentDiscretion>
			<otherManager>1</otherManager>
			<votingAuthority>
				<Sole>170000</Sole>
				<Shared>0</Shared>
				<None>0</None>
			</votingAuthority>
		</infoTable>
		<infoTable>
			<nameOfIssuer>CARVANA CO</nameOfIssuer>
			<titleOfClass>CL A</titleOfClass>
			<cusip>146869102</cusip>
			<value>29984</value>
			<shrsOrPrnAmt>
				<sshPrnamt>1307640</sshPrnamt>
				<sshPrnamtType>SH</sshPrnamtType>
			</shrsOrPrnAmt>
			<investmentDiscretion>DFND</investmentDiscretion>
			<otherManager>1</otherManager>
			<votingAuthority>
				<Sole>1307640</Sole>
				<Shared>0</Shared>
				<None>0</None>
			</votingAuthority>
		</infoTable>
		<infoTable>
			<nameOfIssuer>CARVANA CO</nameOfIssuer>
			<titleOfClass>CL A</titleOfClass>
			<cusip>146869102</cusip>
			<value>2149</value>
			<shrsOrPrnAmt>
				<sshPrnamt>93700</sshPrnamt>
				<sshPrnamtType>SH</sshPrnamtType>
			</shrsOrPrnAmt>
			<putCall>Call</putCall>
			<investmentDiscretion>DFND</investmentDiscretion>
			<otherManager>1</otherManager>
			<votingAuthority>
				<Sole>93700</Sole>
				<Shared>0</Shared>
				<None>0</None>
			</votingAuthority>
		</infoTable>
		<infoTable>
			<nameOfIssuer>CATERPILLAR INC DEL</nameOfIssuer>
			<titleOfClass>COM</titleOfClass>
			<cusip>149123101</cusip>
			<value>11054</value>
			<shrsOrPrnAmt>
				<sshPrnamt>75000</sshPrnamt>
				<sshPrnamtType>SH</sshPrnamtType>
			</shrsOrPrnAmt>
			<putCall>Put</putCall>
			<investmentDiscretion>DFND</investmentDiscretion>
			<otherManager>1</otherManager>
			<votingAuthority>
				<Sole>75000</Sole>
				<Shared>0</Shared>
				<None>0</None>
			</votingAuthority>
		</infoTable>
		<infoTable>
			<nameOfIssuer>CISION LTD</nameOfIssuer>
			<titleOfClass>*W EXP 06/22/202</titleOfClass>
			<cusip>G1992S117</cusip>
			<value>3580</value>
			<shrsOrPrnAmt>
				<sshPrnamt>1530000</sshPrnamt>
				<sshPrnamtType>SH</sshPrnamtType>
			</shrsOrPrnAmt>
			<investmentDiscretion>DFND</investmentDiscretion>
			<otherManager>1</otherManager>
			<votingAuthority>
				<Sole>1530000</Sole>
				<Shared>0</Shared>
				<None>0</None>
			</votingAuthority>
		</infoTable>
		<infoTable>
			<nameOfIssuer>CM SEVEN STAR ACQUISITION CO</nameOfIssuer>
			<titleOfClass>SHS</titleOfClass>
			<cusip>G2345N102</cusip>
			<value>1705</value>
			<shrsOrPrnAmt>
				<sshPrnamt>175000</sshPrnamt>
				<sshPrnamtType>SH</sshPrnamtType>
			</shrsOrPrnAmt>
			<investmentDiscretion>DFND</investmentDiscretion>
			<otherManager>1</otherManager>
			<votingAuthority>
				<Sole>175000</Sole>
				<Shared>0</Shared>
				<None>0</None>
			</votingAuthority>
		</infoTable>
		<infoTable>
			<nameOfIssuer>CM SEVEN STAR ACQUISITION CO</nameOfIssuer>
			<titleOfClass>RIGHT 08/21/2022</titleOfClass>
			<cusip>G2345N136</cusip>
			<value>56</value>
			<shrsOrPrnAmt>
				<sshPrnamt>175000</sshPrnamt>
				<sshPrnamtType>SH</sshPrnamtType>
			</shrsOrPrnAmt>
			<investmentDiscretion>DFND</investmentDiscretion>
			<otherManager>1</otherManager>
			<votingAuthority>
				<Sole>175000</Sole>
				<Shared>0</Shared>
				<None>0</None>
			</votingAuthority>
		</infoTable>
		<infoTable>
			<nameOfIssuer>CM SEVEN STAR ACQUISITION CO</nameOfIssuer>
			<titleOfClass>*W EXP 08/21/202</titleOfClass>
			<cusip>G2345N110</cusip>
			<value>31</value>
			<shrsOrPrnAmt>
				<sshPrnamt>87500</sshPrnamt>
				<sshPrnamtType>SH</sshPrnamtType>
			</shrsOrPrnAmt>
			<investmentDiscretion>DFND</investmentDiscretion>
			<otherManager>1</otherManager>
			<votingAuthority>
				<Sole>87500</Sole>
				<Shared>0</Shared>
				<None>0</None>
			</votingAuthority>
		</infoTable>
		<infoTable>
			<nameOfIssuer>COCA COLA CO</nameOfIssuer>
			<titleOfClass>COM</titleOfClass>
			<cusip>191216100</cusip>
			<value>30401</value>
			<shrsOrPrnAmt>
				<sshPrnamt>700000</sshPrnamt>
				<sshPrnamtType>SH</sshPrnamtType>
			</shrsOrPrnAmt>
			<putCall>Put</putCall>
			<investmentDiscretion>DFND</investmentDiscretion>
			<otherManager>1</otherManager>
			<votingAuthority>
				<Sole>700000</Sole>
				<Shared>0</Shared>
				<None>0</None>
			</votingAuthority>
		</infoTable>
		<infoTable>
			<nameOfIssuer>CONSTELLATION ALPHA CAP CORP</nameOfIssuer>
			<titleOfClass>SHS</titleOfClass>
			<cusip>G2379F108</cusip>
			<value>1777</value>
			<shrsOrPrnAmt>
				<sshPrnamt>180000</sshPrnamt>
				<sshPrnamtType>SH</sshPrnamtType>
			</shrsOrPrnAmt>
			<investmentDiscretion>DFND</investmentDiscretion>
			<otherManager>1</otherManager>
			<votingAuthority>
				<Sole>180000</Sole>
				<Shared>0</Shared>
				<None>0</None>
			</votingAuthority>
		</infoTable>
		<infoTable>
			<nameOfIssuer>CONSTELLATION ALPHA CAP CORP</nameOfIssuer>
			<titleOfClass>RIGHT 99/99/9999</titleOfClass>
			<cusip>G2379F132</cusip>
			<value>65</value>
			<shrsOrPrnAmt>
				<sshPrnamt>180000</sshPrnamt>
				<sshPrnamtType>SH</sshPrnamtType>
			</shrsOrPrnAmt>
			<investmentDiscretion>DFND</investmentDiscretion>
			<otherManager>1</otherManager>
			<votingAuthority>
				<Sole>180000</Sole>
				<Shared>0</Shared>
				<None>0</None>
			</votingAuthority>
		</infoTable>
		<infoTable>
			<nameOfIssuer>CONSTELLATION ALPHA CAP CORP</nameOfIssuer>
			<titleOfClass>*W EXP 03/23/202</titleOfClass>
			<cusip>G2379F116</cusip>
			<value>99</value>
			<shrsOrPrnAmt>
				<sshPrnamt>380000</sshPrnamt>
				<sshPrnamtType>SH</sshPrnamtType>
			</shrsOrPrnAmt>
			<investmentDiscretion>DFND</investmentDiscretion>
			<otherManager>1</otherManager>
			<votingAuthority>
				<Sole>380000</Sole>
				<Shared>0</Shared>
				<None>0</None>
			</votingAuthority>
		</infoTable>
		<infoTable>
			<nameOfIssuer>CONTRAFECT CORP</nameOfIssuer>
			<titleOfClass>COM</titleOfClass>
			<cusip>212326102</cusip>
			<value>4063</value>
			<shrsOrPrnAmt>
				<sshPrnamt>2500000</sshPrnamt>
				<sshPrnamtType>SH</sshPrnamtType>
			</shrsOrPrnAmt>
			<investmentDiscretion>DFND</investmentDiscretion>
			<otherManager>1</otherManager>
			<votingAuthority>
				<Sole>2500000</Sole>
				<Shared>0</Shared>
				<None>0</None>
			</votingAuthority>
		</infoTable>
		<infoTable>
			<nameOfIssuer>CONVERGEONE HLDGS INC</nameOfIssuer>
			<titleOfClass>*W EXP 04/12/202</titleOfClass>
			<cusip>212481113</cusip>
			<value>480</value>
			<shrsOrPrnAmt>
				<sshPrnamt>401806</sshPrnamt>
				<sshPrnamtType>SH</sshPrnamtType>
			</shrsOrPrnAmt>
			<investmentDiscretion>DFND</investmentDiscretion>
			<otherManager>1</otherManager>
			<votingAuthority>
				<Sole>401806</Sole>
				<Shared>0</Shared>
				<None>0</None>
			</votingAuthority>
		</infoTable>
		<infoTable>
			<nameOfIssuer>CRESUD S A C I F Y A</nameOfIssuer>
			<titleOfClass>SPONSORED ADR</titleOfClass>
			<cusip>226406106</cusip>
			<value>15954</value>
			<shrsOrPrnAmt>
				<sshPrnamt>791750</sshPrnamt>
				<sshPrnamtType>SH</sshPrnamtType>
			</shrsOrPrnAmt>
			<investmentDiscretion>DFND</investmentDiscretion>
			<otherManager>1</otherManager>
			<votingAuthority>
				<Sole>791750</Sole>
				<Shared>0</Shared>
				<None>0</None>
			</votingAuthority>
		</infoTable>
		<infoTable>
			<nameOfIssuer>DICERNA PHARMACEUTICALS INC</nameOfIssuer>
			<titleOfClass>COM</titleOfClass>
			<cusip>253031108</cusip>
			<value>1195</value>
			<shrsOrPrnAmt>
				<sshPrnamt>125000</sshPrnamt>
				<sshPrnamtType>SH</sshPrnamtType>
			</shrsOrPrnAmt>
			<investmentDiscretion>DFND</investmentDiscretion>
			<otherManager>1</otherManager>
			<votingAuthority>
				<Sole>125000</Sole>
				<Shared>0</Shared>
				<None>0</None>
			</votingAuthority>
		</infoTable>
		<infoTable>
			<nameOfIssuer>DRAPER OAKWOOD TECHNOLOGY</nameOfIssuer>
			<titleOfClass>RIGHT 09/19/2018</titleOfClass>
			<cusip>26146L129</cusip>
			<value>103</value>
			<shrsOrPrnAmt>
				<sshPrnamt>180000</sshPrnamt>
				<sshPrnamtType>SH</sshPrnamtType>
			</shrsOrPrnAmt>
			<investmentDiscretion>DFND</investmentDiscretion>
			<otherManager>1</otherManager>
			<votingAuthority>
				<Sole>180000</Sole>
				<Shared>0</Shared>
				<None>0</None>
			</votingAuthority>
		</infoTable>
		<infoTable>
			<nameOfIssuer>DRAPER OAKWOOD TECHNOLOGY</nameOfIssuer>
			<titleOfClass>*W EXP 09/19/202</titleOfClass>
			<cusip>26146L111</cusip>
			<value>76</value>
			<shrsOrPrnAmt>
				<sshPrnamt>90000</sshPrnamt>
				<sshPrnamtType>SH</sshPrnamtType>
			</shrsOrPrnAmt>
			<investmentDiscretion>DFND</investmentDiscretion>
			<otherManager>1</otherManager>
			<votingAuthority>
				<Sole>90000</Sole>
				<Shared>0</Shared>
				<None>0</None>
			</votingAuthority>
		</infoTable>
		<infoTable>
			<nameOfIssuer>EASTERLY ACQUISITION CORP</nameOfIssuer>
			<titleOfClass>*W EXP 07/29/202</titleOfClass>
			<cusip>27616L110</cusip>
			<value>798</value>
			<shrsOrPrnAmt>
				<sshPrnamt>949743</sshPrnamt>
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			<investmentDiscretion>DFND</investmentDiscretion>
			<otherManager>1</otherManager>
			<votingAuthority>
				<Sole>949743</Sole>
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				<None>0</None>
			</votingAuthority>
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		<infoTable>
			<nameOfIssuer>ECHOSTAR CORP</nameOfIssuer>
			<titleOfClass>CL A</titleOfClass>
			<cusip>278768106</cusip>
			<value>4222</value>
			<shrsOrPrnAmt>
				<sshPrnamt>80000</sshPrnamt>
				<sshPrnamtType>SH</sshPrnamtType>
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			<investmentDiscretion>DFND</investmentDiscretion>
			<otherManager>1</otherManager>
			<votingAuthority>
				<Sole>80000</Sole>
				<Shared>0</Shared>
				<None>0</None>
			</votingAuthority>
		</infoTable>
		<infoTable>
			<nameOfIssuer>EDISON INTL</nameOfIssuer>
			<titleOfClass>COM</titleOfClass>
			<cusip>281020107</cusip>
			<value>6366</value>
			<shrsOrPrnAmt>
				<sshPrnamt>100000</sshPrnamt>
				<sshPrnamtType>SH</sshPrnamtType>
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			<investmentDiscretion>DFND</investmentDiscretion>
			<otherManager>1</otherManager>
			<votingAuthority>
				<Sole>100000</Sole>
				<Shared>0</Shared>
				<None>0</None>
			</votingAuthority>
		</infoTable>
		<infoTable>
			<nameOfIssuer>EIGER BIOPHARMACEUTICALS INC</nameOfIssuer>
			<titleOfClass>COM</titleOfClass>
			<cusip>28249U105</cusip>
			<value>1924</value>
			<shrsOrPrnAmt>
				<sshPrnamt>195285</sshPrnamt>
				<sshPrnamtType>SH</sshPrnamtType>
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			<investmentDiscretion>DFND</investmentDiscretion>
			<otherManager>1</otherManager>
			<votingAuthority>
				<Sole>195285</Sole>
				<Shared>0</Shared>
				<None>0</None>
			</votingAuthority>
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		<infoTable>
			<nameOfIssuer>ELECTRUM SPL ACQUISITION COR</nameOfIssuer>
			<titleOfClass>*W EXP 06/16/202</titleOfClass>
			<cusip>G3105C112</cusip>
			<value>213</value>
			<shrsOrPrnAmt>
				<sshPrnamt>666200</sshPrnamt>
				<sshPrnamtType>SH</sshPrnamtType>
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			<investmentDiscretion>DFND</investmentDiscretion>
			<otherManager>1</otherManager>
			<votingAuthority>
				<Sole>666200</Sole>
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				<None>0</None>
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		<infoTable>
			<nameOfIssuer>ENERGY RECOVERY INC</nameOfIssuer>
			<titleOfClass>COM</titleOfClass>
			<cusip>29270J100</cusip>
			<value>9042</value>
			<shrsOrPrnAmt>
				<sshPrnamt>1100000</sshPrnamt>
				<sshPrnamtType>SH</sshPrnamtType>
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			<investmentDiscretion>DFND</investmentDiscretion>
			<otherManager>1</otherManager>
			<votingAuthority>
				<Sole>1100000</Sole>
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				<None>0</None>
			</votingAuthority>
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		<infoTable>
			<nameOfIssuer>ENOVA INTL INC</nameOfIssuer>
			<titleOfClass>COM</titleOfClass>
			<cusip>29357K103</cusip>
			<value>13832</value>
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				<sshPrnamt>627300</sshPrnamt>
				<sshPrnamtType>SH</sshPrnamtType>
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			<investmentDiscretion>DFND</investmentDiscretion>
			<otherManager>1</otherManager>
			<votingAuthority>
				<Sole>627300</Sole>
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				<None>0</None>
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		<infoTable>
			<nameOfIssuer>ESTRE AMBIENTAL INC</nameOfIssuer>
			<titleOfClass>*W EXP 12/21/202</titleOfClass>
			<cusip>G3206V118</cusip>
			<value>116</value>
			<shrsOrPrnAmt>
				<sshPrnamt>200000</sshPrnamt>
				<sshPrnamtType>SH</sshPrnamtType>
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			<investmentDiscretion>DFND</investmentDiscretion>
			<otherManager>1</otherManager>
			<votingAuthority>
				<Sole>200000</Sole>
				<Shared>0</Shared>
				<None>0</None>
			</votingAuthority>
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		<infoTable>
			<nameOfIssuer>ETSY INC</nameOfIssuer>
			<titleOfClass>COM</titleOfClass>
			<cusip>29786A106</cusip>
			<value>13609</value>
			<shrsOrPrnAmt>
				<sshPrnamt>485000</sshPrnamt>
				<sshPrnamtType>SH</sshPrnamtType>
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			<investmentDiscretion>DFND</investmentDiscretion>
			<otherManager>1</otherManager>
			<votingAuthority>
				<Sole>485000</Sole>
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				<None>0</None>
			</votingAuthority>
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		<infoTable>
			<nameOfIssuer>EVOKE PHARMA INC</nameOfIssuer>
			<titleOfClass>COM</titleOfClass>
			<cusip>30049G104</cusip>
			<value>238</value>
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				<sshPrnamt>114300</sshPrnamt>
				<sshPrnamtType>SH</sshPrnamtType>
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			<investmentDiscretion>DFND</investmentDiscretion>
			<otherManager>1</otherManager>
			<votingAuthority>
				<Sole>114300</Sole>
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				<None>0</None>
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		<infoTable>
			<nameOfIssuer>FACEBOOK INC</nameOfIssuer>
			<titleOfClass>CL A</titleOfClass>
			<cusip>30303M102</cusip>
			<value>7990</value>
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				<sshPrnamt>50000</sshPrnamt>
				<sshPrnamtType>SH</sshPrnamtType>
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			<putCall>Put</putCall>
			<investmentDiscretion>DFND</investmentDiscretion>
			<otherManager>1</otherManager>
			<votingAuthority>
				<Sole>50000</Sole>
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				<None>0</None>
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		<infoTable>
			<nameOfIssuer>FATE THERAPEUTICS INC</nameOfIssuer>
			<titleOfClass>COM</titleOfClass>
			<cusip>31189P102</cusip>
			<value>9699</value>
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				<sshPrnamt>993711</sshPrnamt>
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			<investmentDiscretion>DFND</investmentDiscretion>
			<otherManager>1</otherManager>
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				<Sole>993711</Sole>
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				<None>0</None>
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		<infoTable>
			<nameOfIssuer>FENNEC PHARMACEUTICALS INC</nameOfIssuer>
			<titleOfClass>COM</titleOfClass>
			<cusip>31447P100</cusip>
			<value>10489</value>
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				<None>0</None>
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		<infoTable>
			<nameOfIssuer>FERRARI N V</nameOfIssuer>
			<titleOfClass>COM</titleOfClass>
			<cusip>N3167Y103</cusip>
			<value>3013</value>
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				<sshPrnamt>25000</sshPrnamt>
				<sshPrnamtType>SH</sshPrnamtType>
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			<putCall>Put</putCall>
			<investmentDiscretion>DFND</investmentDiscretion>
			<otherManager>1</otherManager>
			<votingAuthority>
				<Sole>25000</Sole>
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				<None>0</None>
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		<infoTable>
			<nameOfIssuer>FOGO DE CHAO INC</nameOfIssuer>
			<titleOfClass>COM</titleOfClass>
			<cusip>344177100</cusip>
			<value>14963</value>
			<shrsOrPrnAmt>
				<sshPrnamt>950000</sshPrnamt>
				<sshPrnamtType>SH</sshPrnamtType>
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			<investmentDiscretion>DFND</investmentDiscretion>
			<otherManager>1</otherManager>
			<votingAuthority>
				<Sole>950000</Sole>
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				<None>0</None>
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		<infoTable>
			<nameOfIssuer>GALMED PHARMACEUTICALS LTD</nameOfIssuer>
			<titleOfClass>SHS</titleOfClass>
			<cusip>M47238106</cusip>
			<value>3617</value>
			<shrsOrPrnAmt>
				<sshPrnamt>649295</sshPrnamt>
				<sshPrnamtType>SH</sshPrnamtType>
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			<investmentDiscretion>DFND</investmentDiscretion>
			<otherManager>1</otherManager>
			<votingAuthority>
				<Sole>649295</Sole>
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				<None>0</None>
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		<infoTable>
			<nameOfIssuer>GENCO SHIPPING &amp; TRADING LTD</nameOfIssuer>
			<titleOfClass>SHS</titleOfClass>
			<cusip>Y2685T131</cusip>
			<value>970</value>
			<shrsOrPrnAmt>
				<sshPrnamt>68200</sshPrnamt>
				<sshPrnamtType>SH</sshPrnamtType>
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			<investmentDiscretion>DFND</investmentDiscretion>
			<otherManager>1</otherManager>
			<votingAuthority>
				<Sole>68200</Sole>
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				<None>0</None>
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		<infoTable>
			<nameOfIssuer>GIGCAPITAL INC</nameOfIssuer>
			<titleOfClass>RIGHT 03/06/2020</titleOfClass>
			<cusip>37518N114</cusip>
			<value>76</value>
			<shrsOrPrnAmt>
				<sshPrnamt>200000</sshPrnamt>
				<sshPrnamtType>SH</sshPrnamtType>
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			<investmentDiscretion>DFND</investmentDiscretion>
			<otherManager>1</otherManager>
			<votingAuthority>
				<Sole>200000</Sole>
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				<None>0</None>
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		<infoTable>
			<nameOfIssuer>GIGCAPITAL INC</nameOfIssuer>
			<titleOfClass>*W EXP 06/08/202</titleOfClass>
			<cusip>37518N122</cusip>
			<value>71</value>
			<shrsOrPrnAmt>
				<sshPrnamt>150000</sshPrnamt>
				<sshPrnamtType>SH</sshPrnamtType>
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			<investmentDiscretion>DFND</investmentDiscretion>
			<otherManager>1</otherManager>
			<votingAuthority>
				<Sole>150000</Sole>
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				<None>0</None>
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		</infoTable>
		<infoTable>
			<nameOfIssuer>GORDON POINTE ACQUISITION CO</nameOfIssuer>
			<titleOfClass>COM CLASS A</titleOfClass>
			<cusip>382788107</cusip>
			<value>2185</value>
			<shrsOrPrnAmt>
				<sshPrnamt>225000</sshPrnamt>
				<sshPrnamtType>SH</sshPrnamtType>
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			<investmentDiscretion>DFND</investmentDiscretion>
			<otherManager>1</otherManager>
			<votingAuthority>
				<Sole>225000</Sole>
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				<None>0</None>
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		<infoTable>
			<nameOfIssuer>GORDON POINTE ACQUISITION CO</nameOfIssuer>
			<titleOfClass>*W EXP 07/30/202</titleOfClass>
			<cusip>382788115</cusip>
			<value>122</value>
			<shrsOrPrnAmt>
				<sshPrnamt>225000</sshPrnamt>
				<sshPrnamtType>SH</sshPrnamtType>
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			<investmentDiscretion>DFND</investmentDiscretion>
			<otherManager>1</otherManager>
			<votingAuthority>
				<Sole>225000</Sole>
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				<None>0</None>
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		<infoTable>
			<nameOfIssuer>GREIF INC</nameOfIssuer>
			<titleOfClass>CL B</titleOfClass>
			<cusip>397624206</cusip>
			<value>694</value>
			<shrsOrPrnAmt>
				<sshPrnamt>11910</sshPrnamt>
				<sshPrnamtType>SH</sshPrnamtType>
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			<investmentDiscretion>DFND</investmentDiscretion>
			<otherManager>1</otherManager>
			<votingAuthority>
				<Sole>11910</Sole>
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				<None>0</None>
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		</infoTable>
		<infoTable>
			<nameOfIssuer>GRUBHUB INC</nameOfIssuer>
			<titleOfClass>COM</titleOfClass>
			<cusip>400110102</cusip>
			<value>10147</value>
			<shrsOrPrnAmt>
				<sshPrnamt>100000</sshPrnamt>
				<sshPrnamtType>SH</sshPrnamtType>
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			<putCall>Put</putCall>
			<investmentDiscretion>DFND</investmentDiscretion>
			<otherManager>1</otherManager>
			<votingAuthority>
				<Sole>100000</Sole>
				<Shared>0</Shared>
				<None>0</None>
			</votingAuthority>
		</infoTable>
		<infoTable>
			<nameOfIssuer>HAYMAKER ACQUISITION CORP</nameOfIssuer>
			<titleOfClass>*W EXP 10/27/202</titleOfClass>
			<cusip>420870115</cusip>
			<value>247</value>
			<shrsOrPrnAmt>
				<sshPrnamt>300000</sshPrnamt>
				<sshPrnamtType>SH</sshPrnamtType>
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			<investmentDiscretion>DFND</investmentDiscretion>
			<otherManager>1</otherManager>
			<votingAuthority>
				<Sole>300000</Sole>
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				<None>0</None>
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		</infoTable>
		<infoTable>
			<nameOfIssuer>HEALTH INS INNOVATIONS INC</nameOfIssuer>
			<titleOfClass>COM CL A</titleOfClass>
			<cusip>42225K106</cusip>
			<value>1445</value>
			<shrsOrPrnAmt>
				<sshPrnamt>50000</sshPrnamt>
				<sshPrnamtType>SH</sshPrnamtType>
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			<investmentDiscretion>DFND</investmentDiscretion>
			<otherManager>1</otherManager>
			<votingAuthority>
				<Sole>50000</Sole>
				<Shared>0</Shared>
				<None>0</None>
			</votingAuthority>
		</infoTable>
		<infoTable>
			<nameOfIssuer>HENNESSY CAP ACQUSTON CORP I</nameOfIssuer>
			<titleOfClass>*W EXP 06/15/202</titleOfClass>
			<cusip>42588L113</cusip>
			<value>363</value>
			<shrsOrPrnAmt>
				<sshPrnamt>437500</sshPrnamt>
				<sshPrnamtType>SH</sshPrnamtType>
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			<investmentDiscretion>DFND</investmentDiscretion>
			<otherManager>1</otherManager>
			<votingAuthority>
				<Sole>437500</Sole>
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				<None>0</None>
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		</infoTable>
		<infoTable>
			<nameOfIssuer>HERBALIFE LTD</nameOfIssuer>
			<titleOfClass>COM USD SHS</titleOfClass>
			<cusip>G4412G101</cusip>
			<value>29241</value>
			<shrsOrPrnAmt>
				<sshPrnamt>300000</sshPrnamt>
				<sshPrnamtType>SH</sshPrnamtType>
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			<putCall>Put</putCall>
			<investmentDiscretion>DFND</investmentDiscretion>
			<otherManager>1</otherManager>
			<votingAuthority>
				<Sole>300000</Sole>
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				<None>0</None>
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		<infoTable>
			<nameOfIssuer>HOSTESS BRANDS INC</nameOfIssuer>
			<titleOfClass>*W EXP 11/04/202</titleOfClass>
			<cusip>44109J114</cusip>
			<value>4718</value>
			<shrsOrPrnAmt>
				<sshPrnamt>1999000</sshPrnamt>
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			<investmentDiscretion>DFND</investmentDiscretion>
			<otherManager>1</otherManager>
			<votingAuthority>
				<Sole>1999000</Sole>
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				<None>0</None>
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		</infoTable>
		<infoTable>
			<nameOfIssuer>I AM CAP ACQUISITION CO</nameOfIssuer>
			<titleOfClass>RIGHT 05/22/2019</titleOfClass>
			<cusip>45074Q124</cusip>
			<value>70</value>
			<shrsOrPrnAmt>
				<sshPrnamt>200000</sshPrnamt>
				<sshPrnamtType>SH</sshPrnamtType>
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			<investmentDiscretion>DFND</investmentDiscretion>
			<otherManager>1</otherManager>
			<votingAuthority>
				<Sole>200000</Sole>
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				<None>0</None>
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		</infoTable>
		<infoTable>
			<nameOfIssuer>I AM CAP ACQUISITION CO</nameOfIssuer>
			<titleOfClass>*W EXP 05/22/202</titleOfClass>
			<cusip>45074Q116</cusip>
			<value>308</value>
			<shrsOrPrnAmt>
				<sshPrnamt>700000</sshPrnamt>
				<sshPrnamtType>SH</sshPrnamtType>
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			<investmentDiscretion>DFND</investmentDiscretion>
			<otherManager>1</otherManager>
			<votingAuthority>
				<Sole>700000</Sole>
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				<None>0</None>
			</votingAuthority>
		</infoTable>
		<infoTable>
			<nameOfIssuer>IFRESH INC</nameOfIssuer>
			<titleOfClass>COM</titleOfClass>
			<cusip>449538107</cusip>
			<value>246</value>
			<shrsOrPrnAmt>
				<sshPrnamt>30000</sshPrnamt>
				<sshPrnamtType>SH</sshPrnamtType>
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			<investmentDiscretion>DFND</investmentDiscretion>
			<otherManager>1</otherManager>
			<votingAuthority>
				<Sole>30000</Sole>
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				<None>0</None>
			</votingAuthority>
		</infoTable>
		<infoTable>
			<nameOfIssuer>INDUSTREA ACQUISITION CORP</nameOfIssuer>
			<titleOfClass>*W EXP 08/01/202</titleOfClass>
			<cusip>45579J112</cusip>
			<value>676</value>
			<shrsOrPrnAmt>
				<sshPrnamt>1234606</sshPrnamt>
				<sshPrnamtType>SH</sshPrnamtType>
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			<investmentDiscretion>DFND</investmentDiscretion>
			<otherManager>1</otherManager>
			<votingAuthority>
				<Sole>1234606</Sole>
				<Shared>0</Shared>
				<None>0</None>
			</votingAuthority>
		</infoTable>
		<infoTable>
			<nameOfIssuer>INSPIRED ENTMT INC</nameOfIssuer>
			<titleOfClass>COM</titleOfClass>
			<cusip>45782N108</cusip>
			<value>3379</value>
			<shrsOrPrnAmt>
				<sshPrnamt>614319</sshPrnamt>
				<sshPrnamtType>SH</sshPrnamtType>
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			<investmentDiscretion>DFND</investmentDiscretion>
			<otherManager>1</otherManager>
			<votingAuthority>
				<Sole>614319</Sole>
				<Shared>0</Shared>
				<None>0</None>
			</votingAuthority>
		</infoTable>
		<infoTable>
			<nameOfIssuer>INTERNATIONAL BUSINESS MACHS</nameOfIssuer>
			<titleOfClass>COM</titleOfClass>
			<cusip>459200101</cusip>
			<value>7672</value>
			<shrsOrPrnAmt>
				<sshPrnamt>50000</sshPrnamt>
				<sshPrnamtType>SH</sshPrnamtType>
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			<putCall>Put</putCall>
			<investmentDiscretion>DFND</investmentDiscretion>
			<otherManager>1</otherManager>
			<votingAuthority>
				<Sole>50000</Sole>
				<Shared>0</Shared>
				<None>0</None>
			</votingAuthority>
		</infoTable>
		<infoTable>
			<nameOfIssuer>IOVANCE BIOTHERAPEUTICS INC</nameOfIssuer>
			<titleOfClass>COM</titleOfClass>
			<cusip>462260100</cusip>
			<value>5915</value>
			<shrsOrPrnAmt>
				<sshPrnamt>350000</sshPrnamt>
				<sshPrnamtType>SH</sshPrnamtType>
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		<infoTable>
			<nameOfIssuer>IRSA INVERSIONES Y REP S A</nameOfIssuer>
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		<infoTable>
			<nameOfIssuer>JOHNSON &amp; JOHNSON</nameOfIssuer>
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			<investmentDiscretion>DFND</investmentDiscretion>
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		<infoTable>
			<nameOfIssuer>KELLOGG CO</nameOfIssuer>
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				<sshPrnamt>200000</sshPrnamt>
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			<putCall>Put</putCall>
			<investmentDiscretion>DFND</investmentDiscretion>
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			<nameOfIssuer>KKR &amp; CO L P DEL</nameOfIssuer>
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			<nameOfIssuer>LEAP THERAPEUTICS INC</nameOfIssuer>
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				<sshPrnamt>150000</sshPrnamt>
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			<nameOfIssuer>LEGACY ACQUISITION CORP</nameOfIssuer>
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			<investmentDiscretion>DFND</investmentDiscretion>
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			<nameOfIssuer>LEISURE ACQUISITION CORP</nameOfIssuer>
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				<sshPrnamt>250000</sshPrnamt>
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			<investmentDiscretion>DFND</investmentDiscretion>
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		<infoTable>
			<nameOfIssuer>LEISURE ACQUISITION CORP</nameOfIssuer>
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			<cusip>52539T115</cusip>
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			<nameOfIssuer>LIBERTY TRIPADVISOR HLDGS IN</nameOfIssuer>
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			<cusip>531465102</cusip>
			<value>2150</value>
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				<sshPrnamt>200000</sshPrnamt>
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			<investmentDiscretion>DFND</investmentDiscretion>
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			<nameOfIssuer>M D C HLDGS INC</nameOfIssuer>
			<titleOfClass>COM</titleOfClass>
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				<sshPrnamt>100000</sshPrnamt>
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			<putCall>Put</putCall>
			<investmentDiscretion>DFND</investmentDiscretion>
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			<votingAuthority>
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		<infoTable>
			<nameOfIssuer>MACROGENICS INC</nameOfIssuer>
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			<value>6290</value>
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		<infoTable>
			<nameOfIssuer>MARINUS PHARMACEUTICALS INC</nameOfIssuer>
			<titleOfClass>COM</titleOfClass>
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			<value>4584</value>
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			<nameOfIssuer>MEDICINES CO</nameOfIssuer>
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			<titleOfClass>COM</titleOfClass>
			<cusip>595112103</cusip>
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			<investmentDiscretion>DFND</investmentDiscretion>
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		<infoTable>
			<nameOfIssuer>MIRAGEN THERAPEUTICS INC</nameOfIssuer>
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			<cusip>60463E103</cusip>
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			<investmentDiscretion>DFND</investmentDiscretion>
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		<infoTable>
			<nameOfIssuer>MODERN MEDIA ACQUISITION</nameOfIssuer>
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			<value>400</value>
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			<investmentDiscretion>DFND</investmentDiscretion>
			<otherManager>1</otherManager>
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		<infoTable>
			<nameOfIssuer>MODERN MEDIA ACQUISITION</nameOfIssuer>
			<titleOfClass>*W EXP 05/17/202</titleOfClass>
			<cusip>60765P111</cusip>
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				<sshPrnamt>500000</sshPrnamt>
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			<investmentDiscretion>DFND</investmentDiscretion>
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		<infoTable>
			<nameOfIssuer>MONDELEZ INTL INC</nameOfIssuer>
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			<cusip>609207105</cusip>
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			<putCall>Put</putCall>
			<investmentDiscretion>DFND</investmentDiscretion>
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		<infoTable>
			<nameOfIssuer>MTECH ACQUISITION CORP</nameOfIssuer>
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			<value>719</value>
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			<investmentDiscretion>DFND</investmentDiscretion>
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			<nameOfIssuer>MTECH ACQUISITION CORP</nameOfIssuer>
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			<cusip>55378W115</cusip>
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			<investmentDiscretion>DFND</investmentDiscretion>
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		<infoTable>
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			<value>18242</value>
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			<investmentDiscretion>DFND</investmentDiscretion>
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			<nameOfIssuer>MUDRICK CAP ACQUISITION CORP</nameOfIssuer>
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			<cusip>624745113</cusip>
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			<nameOfIssuer>NATIONAL ENERGY SERVICES REU</nameOfIssuer>
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			<cusip>G6375R115</cusip>
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			<titleOfClass>COM</titleOfClass>
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			<titleOfClass>COM</titleOfClass>
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			<titleOfClass>COM</titleOfClass>
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			<investmentDiscretion>DFND</investmentDiscretion>
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			<cusip>65342H110</cusip>
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			<investmentDiscretion>DFND</investmentDiscretion>
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			<titleOfClass>COM</titleOfClass>
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			<investmentDiscretion>DFND</investmentDiscretion>
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		<infoTable>
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			<investmentDiscretion>DFND</investmentDiscretion>
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		<infoTable>
			<nameOfIssuer>ONCONOVA THERAPEUTICS INC</nameOfIssuer>
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			<nameOfIssuer>ONCONOVA THERAPEUTICS INC</nameOfIssuer>
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		<infoTable>
			<nameOfIssuer>ONE MADISON CORP</nameOfIssuer>
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			<investmentDiscretion>DFND</investmentDiscretion>
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				<Sole>250000</Sole>
				<Shared>0</Shared>
				<None>0</None>
			</votingAuthority>
		</infoTable>
		<infoTable>
			<nameOfIssuer>OPES ACQUISITION CORP</nameOfIssuer>
			<titleOfClass>UNIT 03/07/2023</titleOfClass>
			<cusip>68373P209</cusip>
			<value>1508</value>
			<shrsOrPrnAmt>
				<sshPrnamt>150000</sshPrnamt>
				<sshPrnamtType>SH</sshPrnamtType>
			</shrsOrPrnAmt>
			<investmentDiscretion>DFND</investmentDiscretion>
			<otherManager>1</otherManager>
			<votingAuthority>
				<Sole>150000</Sole>
				<Shared>0</Shared>
				<None>0</None>
			</votingAuthority>
		</infoTable>
		<infoTable>
			<nameOfIssuer>OSPREY ENERGY ACQUISITION CO</nameOfIssuer>
			<titleOfClass>*W EXP 07/21/202</titleOfClass>
			<cusip>688397116</cusip>
			<value>95</value>
			<shrsOrPrnAmt>
				<sshPrnamt>125000</sshPrnamt>
				<sshPrnamtType>SH</sshPrnamtType>
			</shrsOrPrnAmt>
			<investmentDiscretion>DFND</investmentDiscretion>
			<otherManager>1</otherManager>
			<votingAuthority>
				<Sole>125000</Sole>
				<Shared>0</Shared>
				<None>0</None>
			</votingAuthority>
		</infoTable>
		<infoTable>
			<nameOfIssuer>OTONOMY INC</nameOfIssuer>
			<titleOfClass>COM</titleOfClass>
			<cusip>68906L105</cusip>
			<value>2730</value>
			<shrsOrPrnAmt>
				<sshPrnamt>650000</sshPrnamt>
				<sshPrnamtType>SH</sshPrnamtType>
			</shrsOrPrnAmt>
			<investmentDiscretion>DFND</investmentDiscretion>
			<otherManager>1</otherManager>
			<votingAuthority>
				<Sole>650000</Sole>
				<Shared>0</Shared>
				<None>0</None>
			</votingAuthority>
		</infoTable>
		<infoTable>
			<nameOfIssuer>PEABODY ENERGY CORP NEW</nameOfIssuer>
			<titleOfClass>COM</titleOfClass>
			<cusip>704551100</cusip>
			<value>15241</value>
			<shrsOrPrnAmt>
				<sshPrnamt>417566</sshPrnamt>
				<sshPrnamtType>SH</sshPrnamtType>
			</shrsOrPrnAmt>
			<investmentDiscretion>DFND</investmentDiscretion>
			<otherManager>1</otherManager>
			<votingAuthority>
				<Sole>417566</Sole>
				<Shared>0</Shared>
				<None>0</None>
			</votingAuthority>
		</infoTable>
		<infoTable>
			<nameOfIssuer>PENSARE ACQUISITION CORP</nameOfIssuer>
			<titleOfClass>RIGHT 99/99/9999</titleOfClass>
			<cusip>70957E121</cusip>
			<value>115</value>
			<shrsOrPrnAmt>
				<sshPrnamt>230000</sshPrnamt>
				<sshPrnamtType>SH</sshPrnamtType>
			</shrsOrPrnAmt>
			<investmentDiscretion>DFND</investmentDiscretion>
			<otherManager>1</otherManager>
			<votingAuthority>
				<Sole>230000</Sole>
				<Shared>0</Shared>
				<None>0</None>
			</votingAuthority>
		</infoTable>
		<infoTable>
			<nameOfIssuer>PENSARE ACQUISITION CORP</nameOfIssuer>
			<titleOfClass>*W EXP 07/27/202</titleOfClass>
			<cusip>70957E113</cusip>
			<value>54</value>
			<shrsOrPrnAmt>
				<sshPrnamt>115000</sshPrnamt>
				<sshPrnamtType>SH</sshPrnamtType>
			</shrsOrPrnAmt>
			<investmentDiscretion>DFND</investmentDiscretion>
			<otherManager>1</otherManager>
			<votingAuthority>
				<Sole>115000</Sole>
				<Shared>0</Shared>
				<None>0</None>
			</votingAuthority>
		</infoTable>
		<infoTable>
			<nameOfIssuer>PG&amp;E CORP</nameOfIssuer>
			<titleOfClass>COM</titleOfClass>
			<cusip>69331C108</cusip>
			<value>36985</value>
			<shrsOrPrnAmt>
				<sshPrnamt>841910</sshPrnamt>
				<sshPrnamtType>SH</sshPrnamtType>
			</shrsOrPrnAmt>
			<investmentDiscretion>DFND</investmentDiscretion>
			<otherManager>1</otherManager>
			<votingAuthority>
				<Sole>841910</Sole>
				<Shared>0</Shared>
				<None>0</None>
			</votingAuthority>
		</infoTable>
		<infoTable>
			<nameOfIssuer>PLX PHARMA INC</nameOfIssuer>
			<titleOfClass>COM</titleOfClass>
			<cusip>72942A107</cusip>
			<value>73</value>
			<shrsOrPrnAmt>
				<sshPrnamt>21660</sshPrnamt>
				<sshPrnamtType>SH</sshPrnamtType>
			</shrsOrPrnAmt>
			<investmentDiscretion>DFND</investmentDiscretion>
			<otherManager>1</otherManager>
			<votingAuthority>
				<Sole>21660</Sole>
				<Shared>0</Shared>
				<None>0</None>
			</votingAuthority>
		</infoTable>
		<infoTable>
			<nameOfIssuer>REDHILL BIOPHARMA LTD</nameOfIssuer>
			<titleOfClass>SPONSORED ADS</titleOfClass>
			<cusip>757468103</cusip>
			<value>8569</value>
			<shrsOrPrnAmt>
				<sshPrnamt>1663903</sshPrnamt>
				<sshPrnamtType>SH</sshPrnamtType>
			</shrsOrPrnAmt>
			<investmentDiscretion>DFND</investmentDiscretion>
			<otherManager>1</otherManager>
			<votingAuthority>
				<Sole>1663903</Sole>
				<Shared>0</Shared>
				<None>0</None>
			</votingAuthority>
		</infoTable>
		<infoTable>
			<nameOfIssuer>REGENXBIO INC</nameOfIssuer>
			<titleOfClass>COM</titleOfClass>
			<cusip>75901B107</cusip>
			<value>746</value>
			<shrsOrPrnAmt>
				<sshPrnamt>25000</sshPrnamt>
				<sshPrnamtType>SH</sshPrnamtType>
			</shrsOrPrnAmt>
			<investmentDiscretion>DFND</investmentDiscretion>
			<otherManager>1</otherManager>
			<votingAuthority>
				<Sole>25000</Sole>
				<Shared>0</Shared>
				<None>0</None>
			</votingAuthority>
		</infoTable>
		<infoTable>
			<nameOfIssuer>SEADRILL LIMITED</nameOfIssuer>
			<titleOfClass>SHS</titleOfClass>
			<cusip>G7945E105</cusip>
			<value>494</value>
			<shrsOrPrnAmt>
				<sshPrnamt>2469200</sshPrnamt>
				<sshPrnamtType>SH</sshPrnamtType>
			</shrsOrPrnAmt>
			<putCall>Put</putCall>
			<investmentDiscretion>DFND</investmentDiscretion>
			<otherManager>1</otherManager>
			<votingAuthority>
				<Sole>2469200</Sole>
				<Shared>0</Shared>
				<None>0</None>
			</votingAuthority>
		</infoTable>
		<infoTable>
			<nameOfIssuer>SELECT SECTOR SPDR TR</nameOfIssuer>
			<titleOfClass>ENERGY</titleOfClass>
			<cusip>81369Y506</cusip>
			<value>6741</value>
			<shrsOrPrnAmt>
				<sshPrnamt>100000</sshPrnamt>
				<sshPrnamtType>SH</sshPrnamtType>
			</shrsOrPrnAmt>
			<putCall>Put</putCall>
			<investmentDiscretion>DFND</investmentDiscretion>
			<otherManager>1</otherManager>
			<votingAuthority>
				<Sole>100000</Sole>
				<Shared>0</Shared>
				<None>0</None>
			</votingAuthority>
		</infoTable>
		<infoTable>
			<nameOfIssuer>SELECT SECTOR SPDR TR</nameOfIssuer>
			<titleOfClass>SBI CONS STPLS</titleOfClass>
			<cusip>81369Y308</cusip>
			<value>10526</value>
			<shrsOrPrnAmt>
				<sshPrnamt>200000</sshPrnamt>
				<sshPrnamtType>SH</sshPrnamtType>
			</shrsOrPrnAmt>
			<putCall>Put</putCall>
			<investmentDiscretion>DFND</investmentDiscretion>
			<otherManager>1</otherManager>
			<votingAuthority>
				<Sole>200000</Sole>
				<Shared>0</Shared>
				<None>0</None>
			</votingAuthority>
		</infoTable>
		<infoTable>
			<nameOfIssuer>SELECT SECTOR SPDR TR</nameOfIssuer>
			<titleOfClass>SBI INT-UTILS</titleOfClass>
			<cusip>81369Y886</cusip>
			<value>10106</value>
			<shrsOrPrnAmt>
				<sshPrnamt>200000</sshPrnamt>
				<sshPrnamtType>SH</sshPrnamtType>
			</shrsOrPrnAmt>
			<putCall>Put</putCall>
			<investmentDiscretion>DFND</investmentDiscretion>
			<otherManager>1</otherManager>
			<votingAuthority>
				<Sole>200000</Sole>
				<Shared>0</Shared>
				<None>0</None>
			</votingAuthority>
		</infoTable>
		<infoTable>
			<nameOfIssuer>SEQUENTIAL BRNDS GROUP INC N</nameOfIssuer>
			<titleOfClass>COM</titleOfClass>
			<cusip>81734P107</cusip>
			<value>6998</value>
			<shrsOrPrnAmt>
				<sshPrnamt>3356200</sshPrnamt>
				<sshPrnamtType>SH</sshPrnamtType>
			</shrsOrPrnAmt>
			<investmentDiscretion>DFND</investmentDiscretion>
			<otherManager>1</otherManager>
			<votingAuthority>
				<Sole>3356200</Sole>
				<Shared>0</Shared>
				<None>0</None>
			</votingAuthority>
		</infoTable>
		<infoTable>
			<nameOfIssuer>SIERRA ONCOLOGY INC</nameOfIssuer>
			<titleOfClass>COM</titleOfClass>
			<cusip>82640U107</cusip>
			<value>3600</value>
			<shrsOrPrnAmt>
				<sshPrnamt>1739074</sshPrnamt>
				<sshPrnamtType>SH</sshPrnamtType>
			</shrsOrPrnAmt>
			<investmentDiscretion>DFND</investmentDiscretion>
			<otherManager>1</otherManager>
			<votingAuthority>
				<Sole>1739074</Sole>
				<Shared>0</Shared>
				<None>0</None>
			</votingAuthority>
		</infoTable>
		<infoTable>
			<nameOfIssuer>SIMPLY GOOD FOODS CO</nameOfIssuer>
			<titleOfClass>*W EXP 07/07/202</titleOfClass>
			<cusip>82900L110</cusip>
			<value>3907</value>
			<shrsOrPrnAmt>
				<sshPrnamt>800000</sshPrnamt>
				<sshPrnamtType>SH</sshPrnamtType>
			</shrsOrPrnAmt>
			<investmentDiscretion>DFND</investmentDiscretion>
			<otherManager>1</otherManager>
			<votingAuthority>
				<Sole>800000</Sole>
				<Shared>0</Shared>
				<None>0</None>
			</votingAuthority>
		</infoTable>
		<infoTable>
			<nameOfIssuer>SOLENO THERAPEUTICS INC</nameOfIssuer>
			<titleOfClass>COM NEW</titleOfClass>
			<cusip>834203200</cusip>
			<value>1530</value>
			<shrsOrPrnAmt>
				<sshPrnamt>844112</sshPrnamt>
				<sshPrnamtType>SH</sshPrnamtType>
			</shrsOrPrnAmt>
			<investmentDiscretion>DFND</investmentDiscretion>
			<otherManager>1</otherManager>
			<votingAuthority>
				<Sole>844112</Sole>
				<Shared>0</Shared>
				<None>0</None>
			</votingAuthority>
		</infoTable>
		<infoTable>
			<nameOfIssuer>SOLENO THERAPEUTICS INC</nameOfIssuer>
			<titleOfClass>*W EXP 11/12/201</titleOfClass>
			<cusip>834203135</cusip>
			<value>273</value>
			<shrsOrPrnAmt>
				<sshPrnamt>602443</sshPrnamt>
				<sshPrnamtType>SH</sshPrnamtType>
			</shrsOrPrnAmt>
			<investmentDiscretion>DFND</investmentDiscretion>
			<otherManager>1</otherManager>
			<votingAuthority>
				<Sole>602443</Sole>
				<Shared>0</Shared>
				<None>0</None>
			</votingAuthority>
		</infoTable>
		<infoTable>
			<nameOfIssuer>SPDR SERIES TRUST</nameOfIssuer>
			<titleOfClass>S&amp;P RETAIL ETF</titleOfClass>
			<cusip>78464A714</cusip>
			<value>4430</value>
			<shrsOrPrnAmt>
				<sshPrnamt>100000</sshPrnamt>
				<sshPrnamtType>SH</sshPrnamtType>
			</shrsOrPrnAmt>
			<putCall>Put</putCall>
			<investmentDiscretion>DFND</investmentDiscretion>
			<otherManager>1</otherManager>
			<votingAuthority>
				<Sole>100000</Sole>
				<Shared>0</Shared>
				<None>0</None>
			</votingAuthority>
		</infoTable>
		<infoTable>
			<nameOfIssuer>STRONGBRIDGE BIOPHARMA PLC</nameOfIssuer>
			<titleOfClass>SHS USD</titleOfClass>
			<cusip>G85347105</cusip>
			<value>2213</value>
			<shrsOrPrnAmt>
				<sshPrnamt>250000</sshPrnamt>
				<sshPrnamtType>SH</sshPrnamtType>
			</shrsOrPrnAmt>
			<investmentDiscretion>DFND</investmentDiscretion>
			<otherManager>1</otherManager>
			<votingAuthority>
				<Sole>250000</Sole>
				<Shared>0</Shared>
				<None>0</None>
			</votingAuthority>
		</infoTable>
		<infoTable>
			<nameOfIssuer>SYNDAX PHARMACEUTICALS INC</nameOfIssuer>
			<titleOfClass>COM</titleOfClass>
			<cusip>87164F105</cusip>
			<value>4030</value>
			<shrsOrPrnAmt>
				<sshPrnamt>283230</sshPrnamt>
				<sshPrnamtType>SH</sshPrnamtType>
			</shrsOrPrnAmt>
			<investmentDiscretion>DFND</investmentDiscretion>
			<otherManager>1</otherManager>
			<votingAuthority>
				<Sole>283230</Sole>
				<Shared>0</Shared>
				<None>0</None>
			</votingAuthority>
		</infoTable>
		<infoTable>
			<nameOfIssuer>SYNTHETIC BIOLOGICS INC</nameOfIssuer>
			<titleOfClass>COM</titleOfClass>
			<cusip>87164U102</cusip>
			<value>478</value>
			<shrsOrPrnAmt>
				<sshPrnamt>1500000</sshPrnamt>
				<sshPrnamtType>SH</sshPrnamtType>
			</shrsOrPrnAmt>
			<investmentDiscretion>DFND</investmentDiscretion>
			<otherManager>1</otherManager>
			<votingAuthority>
				<Sole>1500000</Sole>
				<Shared>0</Shared>
				<None>0</None>
			</votingAuthority>
		</infoTable>
		<infoTable>
			<nameOfIssuer>TARGET CORP</nameOfIssuer>
			<titleOfClass>COM</titleOfClass>
			<cusip>87612E106</cusip>
			<value>1736</value>
			<shrsOrPrnAmt>
				<sshPrnamt>25000</sshPrnamt>
				<sshPrnamtType>SH</sshPrnamtType>
			</shrsOrPrnAmt>
			<putCall>Put</putCall>
			<investmentDiscretion>DFND</investmentDiscretion>
			<otherManager>1</otherManager>
			<votingAuthority>
				<Sole>25000</Sole>
				<Shared>0</Shared>
				<None>0</None>
			</votingAuthority>
		</infoTable>
		<infoTable>
			<nameOfIssuer>TESLA INC</nameOfIssuer>
			<titleOfClass>COM</titleOfClass>
			<cusip>88160R101</cusip>
			<value>161009</value>
			<shrsOrPrnAmt>
				<sshPrnamt>605000</sshPrnamt>
				<sshPrnamtType>SH</sshPrnamtType>
			</shrsOrPrnAmt>
			<putCall>Put</putCall>
			<investmentDiscretion>DFND</investmentDiscretion>
			<otherManager>1</otherManager>
			<votingAuthority>
				<Sole>605000</Sole>
				<Shared>0</Shared>
				<None>0</None>
			</votingAuthority>
		</infoTable>
		<infoTable>
			<nameOfIssuer>TETRAPHASE PHARMACEUTICALS I</nameOfIssuer>
			<titleOfClass>COM</titleOfClass>
			<cusip>88165N105</cusip>
			<value>1842</value>
			<shrsOrPrnAmt>
				<sshPrnamt>600000</sshPrnamt>
				<sshPrnamtType>SH</sshPrnamtType>
			</shrsOrPrnAmt>
			<investmentDiscretion>DFND</investmentDiscretion>
			<otherManager>1</otherManager>
			<votingAuthority>
				<Sole>600000</Sole>
				<Shared>0</Shared>
				<None>0</None>
			</votingAuthority>
		</infoTable>
		<infoTable>
			<nameOfIssuer>TIBERIUS ACQUISITION CORP</nameOfIssuer>
			<titleOfClass>UNIT 02/28/2021</titleOfClass>
			<cusip>88633A206</cusip>
			<value>4542</value>
			<shrsOrPrnAmt>
				<sshPrnamt>450000</sshPrnamt>
				<sshPrnamtType>SH</sshPrnamtType>
			</shrsOrPrnAmt>
			<investmentDiscretion>DFND</investmentDiscretion>
			<otherManager>1</otherManager>
			<votingAuthority>
				<Sole>450000</Sole>
				<Shared>0</Shared>
				<None>0</None>
			</votingAuthority>
		</infoTable>
		<infoTable>
			<nameOfIssuer>TIDEWATER INC NEW</nameOfIssuer>
			<titleOfClass>*W EXP 07/31/202</titleOfClass>
			<cusip>88642R125</cusip>
			<value>509</value>
			<shrsOrPrnAmt>
				<sshPrnamt>60962</sshPrnamt>
				<sshPrnamtType>SH</sshPrnamtType>
			</shrsOrPrnAmt>
			<investmentDiscretion>DFND</investmentDiscretion>
			<otherManager>1</otherManager>
			<votingAuthority>
				<Sole>60962</Sole>
				<Shared>0</Shared>
				<None>0</None>
			</votingAuthority>
		</infoTable>
		<infoTable>
			<nameOfIssuer>TIME WARNER INC</nameOfIssuer>
			<titleOfClass>COM NEW</titleOfClass>
			<cusip>887317303</cusip>
			<value>18916</value>
			<shrsOrPrnAmt>
				<sshPrnamt>200000</sshPrnamt>
				<sshPrnamtType>SH</sshPrnamtType>
			</shrsOrPrnAmt>
			<investmentDiscretion>DFND</investmentDiscretion>
			<otherManager>1</otherManager>
			<votingAuthority>
				<Sole>200000</Sole>
				<Shared>0</Shared>
				<None>0</None>
			</votingAuthority>
		</infoTable>
		<infoTable>
			<nameOfIssuer>TRACON PHARMACEUTICALS INC</nameOfIssuer>
			<titleOfClass>COM</titleOfClass>
			<cusip>89237H100</cusip>
			<value>3450</value>
			<shrsOrPrnAmt>
				<sshPrnamt>1500000</sshPrnamt>
				<sshPrnamtType>SH</sshPrnamtType>
			</shrsOrPrnAmt>
			<investmentDiscretion>DFND</investmentDiscretion>
			<otherManager>1</otherManager>
			<votingAuthority>
				<Sole>1500000</Sole>
				<Shared>0</Shared>
				<None>0</None>
			</votingAuthority>
		</infoTable>
		<infoTable>
			<nameOfIssuer>TRIVAGO N V</nameOfIssuer>
			<titleOfClass>SPON ADS A SHS</titleOfClass>
			<cusip>89686D105</cusip>
			<value>27800</value>
			<shrsOrPrnAmt>
				<sshPrnamt>4000000</sshPrnamt>
				<sshPrnamtType>SH</sshPrnamtType>
			</shrsOrPrnAmt>
			<investmentDiscretion>DFND</investmentDiscretion>
			<otherManager>1</otherManager>
			<votingAuthority>
				<Sole>4000000</Sole>
				<Shared>0</Shared>
				<None>0</None>
			</votingAuthority>
		</infoTable>
		<infoTable>
			<nameOfIssuer>TRUECAR INC</nameOfIssuer>
			<titleOfClass>COM</titleOfClass>
			<cusip>89785L107</cusip>
			<value>30871</value>
			<shrsOrPrnAmt>
				<sshPrnamt>3263358</sshPrnamt>
				<sshPrnamtType>SH</sshPrnamtType>
			</shrsOrPrnAmt>
			<investmentDiscretion>DFND</investmentDiscretion>
			<otherManager>1</otherManager>
			<votingAuthority>
				<Sole>3263358</Sole>
				<Shared>0</Shared>
				<None>0</None>
			</votingAuthority>
		</infoTable>
		<infoTable>
			<nameOfIssuer>UNION ACQUISITION CORP</nameOfIssuer>
			<titleOfClass>UNIT 99/99/9999</titleOfClass>
			<cusip>G9366W119</cusip>
			<value>2046</value>
			<shrsOrPrnAmt>
				<sshPrnamt>200000</sshPrnamt>
				<sshPrnamtType>SH</sshPrnamtType>
			</shrsOrPrnAmt>
			<investmentDiscretion>DFND</investmentDiscretion>
			<otherManager>1</otherManager>
			<votingAuthority>
				<Sole>200000</Sole>
				<Shared>0</Shared>
				<None>0</None>
			</votingAuthority>
		</infoTable>
		<infoTable>
			<nameOfIssuer>UNIQURE NV</nameOfIssuer>
			<titleOfClass>SHS</titleOfClass>
			<cusip>N90064101</cusip>
			<value>24675</value>
			<shrsOrPrnAmt>
				<sshPrnamt>1050000</sshPrnamt>
				<sshPrnamtType>SH</sshPrnamtType>
			</shrsOrPrnAmt>
			<investmentDiscretion>DFND</investmentDiscretion>
			<otherManager>1</otherManager>
			<votingAuthority>
				<Sole>1050000</Sole>
				<Shared>0</Shared>
				<None>0</None>
			</votingAuthority>
		</infoTable>
		<infoTable>
			<nameOfIssuer>VASCULAR BIOGENICS LTD</nameOfIssuer>
			<titleOfClass>COM</titleOfClass>
			<cusip>M96883109</cusip>
			<value>920</value>
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			<nameOfIssuer>WALMART INC</nameOfIssuer>
			<titleOfClass>COM</titleOfClass>
			<cusip>931142103</cusip>
			<value>6673</value>
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				<sshPrnamt>75000</sshPrnamt>
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			<putCall>Put</putCall>
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			<nameOfIssuer>WARRIOR MET COAL INC</nameOfIssuer>
			<titleOfClass>COM</titleOfClass>
			<cusip>93627C101</cusip>
			<value>8403</value>
			<shrsOrPrnAmt>
				<sshPrnamt>300000</sshPrnamt>
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			<investmentDiscretion>DFND</investmentDiscretion>
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				<None>0</None>
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			<nameOfIssuer>WILLSCOT CORP</nameOfIssuer>
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			<cusip>971375118</cusip>
			<value>4309</value>
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				<Sole>2579958</Sole>
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			<nameOfIssuer>WRIGHT MED GROUP N V</nameOfIssuer>
			<titleOfClass>RIGHT 03/01/2019</titleOfClass>
			<cusip>N96617126</cusip>
			<value>1122</value>
			<shrsOrPrnAmt>
				<sshPrnamt>819181</sshPrnamt>
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			<investmentDiscretion>DFND</investmentDiscretion>
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				<Sole>819181</Sole>
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				<None>0</None>
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		<infoTable>
			<nameOfIssuer>XENIA HOTELS &amp; RESORTS INC</nameOfIssuer>
			<titleOfClass>COM</titleOfClass>
			<cusip>984017103</cusip>
			<value>14297</value>
			<shrsOrPrnAmt>
				<sshPrnamt>725000</sshPrnamt>
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			<investmentDiscretion>DFND</investmentDiscretion>
			<otherManager>1</otherManager>
			<votingAuthority>
				<Sole>725000</Sole>
				<Shared>0</Shared>
				<None>0</None>
			</votingAuthority>
		</infoTable>
		<infoTable>
			<nameOfIssuer>ZAFGEN INC</nameOfIssuer>
			<titleOfClass>COM</titleOfClass>
			<cusip>98885E103</cusip>
			<value>9685</value>
			<shrsOrPrnAmt>
				<sshPrnamt>1300000</sshPrnamt>
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			<investmentDiscretion>DFND</investmentDiscretion>
			<otherManager>1</otherManager>
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				<Sole>1300000</Sole>
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				<None>0</None>
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</informationTable>
