| abstract |
The present invention relates to compounds of formula I which inhibit dipeptidyl peptidase IV (DPP-IV) and are useful for the prevention or treatment of diabetes, especially type II diabetes, as well as hyperglycemia, Syndrome X, hyperinsulinemia, obesity, atherosclerosis, and various immunomodulatory diseases. Or pharmaceutically acceptable salts or prodrugs thereof, wherein X,R,R1,R2 and R3 have the definitions given in the description. |