Attached files

file filename
EX-32.2 - EX-32.2 - Onconova Therapeutics, Inc.a2231491zex-32_2.htm
EX-32.1 - EX-32.1 - Onconova Therapeutics, Inc.a2231491zex-32_1.htm
EX-31.2 - EX-31.2 - Onconova Therapeutics, Inc.a2231491zex-31_2.htm
EX-31.1 - EX-31.1 - Onconova Therapeutics, Inc.a2231491zex-31_1.htm
EX-21.1 - EX-21.1 - Onconova Therapeutics, Inc.a2231491zex-21_1.htm
EX-10.27 - EX-10.27 - Onconova Therapeutics, Inc.a2231491zex-10_27.htm
10-K - 10-K - Onconova Therapeutics, Inc.a2231491z10-k.htm

QuickLinks -- Click here to rapidly navigate through this document


Exhibit 23.1

Consent of Independent Registered Public Accounting Firm

        We consent to the incorporation by reference in the Registration Statements (Form S-8 No. 333-191161, Form S-8 No. 333-194228, Form S-8 No. 333-204210, Form S-8 No. 333-210694, Form S-8 No. 333-215575 and Form S-3 No. 333-199219) of our report dated March 29, 2017, with respect to the consolidated financial statements of Onconova Therapeutics, Inc. included in this Annual Report (Form 10-K) for the year ended December 31, 2016.

    /s/ Ernst & Young LLP

Philadelphia, Pennsylvania
March 29, 2017




QuickLinks

Consent of Independent Registered Public Accounting Firm