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EXHIBIT 32.1

CERTIFICATION PURSUANT TO

18 U.S.C. SECTION 1350,

AS ADOPTED PURSUANT TO SECTION 906

OF THE SARBANES-OXLEY ACT OF 2002

In connection with the Annual Report of Acer Therapeutics Inc. (the “Company”) on Form 10-K for the period ending December 31, 2022 (the “Report”), as filed with the Securities and Exchange Commission on the date hereof, I, Chris Schelling, President and Chief Executive Officer of the Company, certify, pursuant to 18 U.S.C. §1350, as adopted pursuant to §906 of the Sarbanes-Oxley Act of 2002, to the best of my knowledge, that:

1.
The Report fully complies with the requirements of section 13(a) or 15(d) of the Securities Exchange Act of 1934; and
2.
The information contained in the Report fairly presents, in all material respects, the financial condition and results of operations of the Company.

 

Date: March 27, 2023

 

By:

/s/ Chris Schelling

 

 

 

Chris Schelling

President and Chief Executive Officer

(Principal Executive Officer)