Patent ID: 8829209

Claim:
A cycloalkylcarbonylamino acid ester compound of formula (I) or a pharmaceutically acceptable salt thereof: wherein R 1 is a substituted or unsubstituted aromatic hydrocarbon group, a substituted or unsubstituted heterocyclic group, or a group R 4 O—, wherein R 4 is a substituted or unsubstituted alkyl group, a substituted or unsubstituted alkenyl group, a substituted or unsubstituted alkynyl group, a substituted or unsubstituted aromatic hydrocarbon group, or a substituted or unsubstituted heterocyclic group; R 2 is a primary or secondary unsubstituted alkyl group, a substituted or unsubstituted alkenyl group, a substituted or unsubstituted alkenyl group, a substituted or unsubstituted aromatic hydrocarbon group or a substituted or unsubstituted heterocyclic group; ring A is a 1,1-cyclohexanediyl group; and, R 8 consists of a substituted or unsubstituted C 1-6 alkyl group; provided that: if R 2 is a 2,2-dimethylpropyl group or a 2-propyl group, then R 8 is not a benzyl group, and further if R 2 is a 1,1-dimethylethyl group, a 2-methylpropyl group or a methyl group, then R 8 is not a methyl group.