Patent ID: 8357718

Claim:
A compound of the formula: or a pharmaceutically acceptable salt thereof; wherein; Z is oxo-cyclohexyl, hydroxy-cyclohexyl, hydroxyimino-cyclohexyl, methoxyimino-cyclohexyl, methoxy-cyclohexyl, carboxy-cyclohexyl, or hydroxy-methyl-cyclohexyl; Rf, Rg and Rh in each case are independently H or C 1-6 alkyl; Y is phenyl, phenyl substituted by F, phenyl substituted by Cl, phenyl substituted by methoxy, phenyl substituted by cyano, phenyl disubstituted by F, or phenyl disubstituted by acetyl; X is methyl-cyclohexyl or fluoro-methyl-cyclohexyl; and m is 0.