| 摘要 |
Cycloalkylcarbonylamino acid derivatives, which are raw material intermediates of a novel cycloalkane carboxamide derivative that selectively inhibits cathepsin K, and a production process thereof, are provided. A cycloalkylcarbonylamino acid derivative represented by the following general formula (I), or a pharmaceutically acceptable salt thereof: (wherein, R1 and R2 represent alkyl groups, alkenyl groups, alkynyl groups, aromatic hydrocarbon groups, heterocyclic groups or the like, and ring A represents a cyclic alkylidene group having 5, 6 or 7 carbon atoms).
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