DPP-IV INHIBITOR INCLUDING BETA-AMINO GROUP, PREPARATION METHOD THEREOF AND PHARMACEUTICAL COMPOSITION CONTAINING THE SAME FOR PREVENTING AND TREATING A DIABETES OR AN OBESITY

摘要

Disclosed is a compound of formula (I), wherein the substituents are as defined in the specification, and processes for their preparation.  The compounds have inhibitory activity on dipeptidyl peptidase-IV (DPP-IV).