| abstract |
The present invention provides the following formula (I) useful as a preventive or therapeutic agent for diseases or conditions that can be improved by inhibiting dipeptidyl peptidase IV (DPPIV), diabetes, immune diseases and the like. (In the formula, A represents a hydrogen atom or a fluorine atom, R 1 and R 2 are as defined in the specification; X represents a single bond or an alkylene group having 1 to 3 carbon atoms, R 3 represents a formula —N (R 4 ) COR 5 , —N (R 4 ) SO 2 R 5 or the like. ) The cyanofluoropyrrolidine compound represented by these, its pharmaceutically acceptable salt, or its hydrate. |