X0202 3 2007-02-21 0 0001211583 ADHEREX TECHNOLOGIES INC AMEX:ADH 0001237144 PORTER ARTHUR T 4620 CREEKSTONE DRIVE, SUITE 200 DURHAM NC 27703 1 0 0 0 Stock Options (Right to buy) .28 2007-02-28 2014-02-28 Common Stock 50000 D Stock Options (Right to buy) .88 2006-12-14 2012-12-14 Common Stock 2500 D Stock Options (Right to buy) 1.2 2006-05-18 2012-05-18 Common Stock 18621 D Stock Options (Right to buy) 1.2 2006-09-21 2012-09-21 Common Stock 30000 D Stock Options (Right to buy) 1.95 2005-12-17 2011-12-17 Common Stock 2000 D Stock Options (Right to buy) 2.9 2004-05-21 2011-05-21 Common Stock 4000 D Stock Options (Right to buy) 3.25 2005-03-01 2011-03-01 Common Stock 18621 D The options to which this note relates are subject to vesting in three (3) installments with one-third vesting immediately and the remaining shares vesting on the first and second anniversary of the Grant Date reported above. The options to which this note relates vest in three (3) equal installments beginning on the date reported above. Exercise price for these options are in Canadian Dollars. D. Scott Murray, Attorney-in-Fact 2007-03-05