751 Monotherapy results from an ongoing phase 1a dose escalation study of NDI-101150, a highly selective oral hematopoietic progenitor kinase 1 (HPK1) inhibitor by Scott Daigle, Sunil Sharma, Xinyan Zhang, Martin Gutierrez, Patricia Fraser, David Sommerhalder, Scott Boiko, Esha A Gangolli, Bhaskar Srivastava, Frank G Basile, Marcus Noel, Amanda Hoerres, Nawaid Rana, Rama Balaraman