| abstract |
Compounds represented by the general formula (I), prodrugs thereof, or pharmaceutically acceptable salts of both are provided as compounds which have high DPP-IV inhibiting activity and are improved in safety, toxicity and so on: (I) n n n n n n n n n n wherein the solid line and dotted line between A 1 and A 2 represents a double bond (A 1 =A 2 ) or the like; A 1 is C(R 4 ) or the like; A 2 is nitrogen atom or the like; R 1 is hydrogen atom, optionally substituted alkly group, or the like; R 2 is hydrogen atom, optionally substituted alkyl group, or the like; R 3 is hydrogen atom, halogen atom, or the like; R 4 is hydrogen atom, hydroxyl, halogen atom, or the like; and Y is a group represented by the general formula (A) or the like; (A) n n n n n n n n n n [wherein m1 is 0, 1, 2 or 3; and the group (A) may be freed from R 6 or substituted with one or two R 6 's which are each independently halogen atom or the like.] |