Gosogliptin hydrochloride is the hydrochloride salt of Gosogliptin. Gosogliptin (PF-00734200) is a potent, orally active selective competitive inhibitor of DPP-IV, which is primarily responsible for degrading the incretin hormones GLP-1 and glucose-dependent insulinotropic polypeptide. Gosogliptin rapidly and reversibly inhibits plasma DPP-4 activity, stimulates insulin secretion, and improves glucose tolerance.