TETRAHYDRO-IMIDAZO[1,5-A]PYRAZINE DERIVATIVES, PREPARATION METHODS AND MEDICAL USES THEREOF

摘要

Tetrahydro-imidazo[1,5-a]pyrazine derivatives of formula I, their preparation methods, pharmaceutical compositions containing the derivatives and uses thereof as medicaments, especially as dipeptidyl peptidase IV inhibitor, wherein the substituents of formula I are defined as same as the description.(I).