Abstract 6636: Therapy with BXCL701 (B), a DPP8, DPP9, DPPIV and FAP inhibitor, in combination with anti-PD1 antibody (PD1) in a syngeneic murine pancreatic ductal adenocarcinoma (PDAC) model improves treatment outcomes and induces intratumoral NK cell infiltrates and a marked reduction in tumor stromal fibrosis