Nic-15 (compound 4n) serves as an anti-constrictive agent targeting the low vascular characteristics of pancreatic tumors. These characteristics enable cancer cells to adapt to the nutrient-deficient tumor microenvironment and develop resistance to treatment. Nic-15 modulates the PI3K/Akt/mTOR pathway and alleviates ER stress induced by Gemcitabine. It significantly inhibits migration and colony formation in MIA PaCa-2 and PANC-1 pancreatic cancer cells. When used in combination with Gemcitabine, Nic-15 effectively addresses resistance issues in pancreatic tumors. In xenograft models in vivo, Nic-15 notably enhances the efficacy of Gemcitabine.