EXHIBIT 31.3
Certification of Chief Executive Officer
I, James B. Breitmeyer, certify that:
1. |
I have reviewed this Form 10-K/A of Oncternal Therapeutics, Inc.; and |
2. |
Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which such statements were made, not misleading with respect to the period covered by this report. |
Date: April 28, 2023
|
|
/s/ James B. Breitmeyer |
James B. Breitmeyer |
Chief Executive Officer |