Exhibit 23.1
CONSENT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM
We consent to the incorporation by reference in this Registration Statement on Form S-8 of our report dated March 7, 2019, relating to the financial statements of Syndax Pharmaceuticals, Inc. and its subsidiaries, appearing in the Annual Report on Form 10-K of Syndax Pharmaceuticals, Inc. for the year ended December 31, 2018.
/s/ Deloitte & Touche LLP
Boston, Massachusetts
August 7, 2019