Exhibit 24

CONFIRMING STATEMENT

       This Statement confirms that the undersigned has authorized and
designated each of Harry S. Palmin, Jason Kneeland and Donald R.
Joseph (each an "attorney-in-fact"), each acting singly, to execute
and file or cause to be filed on the undersigned's behalf a Form ID
and all Forms 3, 4, and 5 (including any amendments thereto) that the
undersigned may be required to file with the U.S. Securities and Exchange
Commission as a result of the undersigned's ownership of or transactions
in securities of Acer Therapeutics Inc. The undersigned hereby grants to
each attorney-in-fact full power and authority to do and perform any and
every act and thing whatsoever requisite, necessary or proper to be done
in the exercise of any of the rights and powers herein granted, as fully
to all intents and purposes as the undersigned might or could do
personally present, with full power of substitution, resubstitution or
revocation, hereby ratifying and confirming all that such attorney-in-fact,
or such attorney's-in-fact substitute or substitutes, shall lawfully do or
cause to be done by virtue of this power of attorney and the rights and
powers herein granted. The authority of each attorney-in-fact under this
Statement shall continue until the undersigned is no longer required to
file Forms 3, 4, and 5 with regard to the undersigned's ownership of or
transactions in securities of Acer Therapeutics Inc. unless earlier revoked
in writing. The undersigned acknowledges that none of the attorneys-in-fact
are assuming any of the undersigned's responsibilities to comply with Section
16 of the Securities Exchange Act of 1934.

       This Statement revokes the authority of any person named in any prior
confirming statement relating to the undersigned's filing obligations with
respect to securities of Acer Therapeutics Inc. who is not named herein, and
this Statement replaces and supersedes any such prior confirming statement.



Signed:	/s/ Adrian W. Quartel
Print Name: Adrian W. Quartel
Dated:  2/16/2022