Patent ID: 7125907

Claim:
A compound of formula I, or a pharmaceutically acceptable equivalent, an optical isomer or a mixture of isomers of the compound, wherein: X is C 1 –C 4 alkylene, C 2 –C 4 alkenylene, C 2 –C 4 alkynylene, C 3 –C 8 cycloalkylene, C 5 –C 7 cycloalkenylene or Ar, wherein the alkylene, alkenylene, alkynylene, cycloalkylene or cycloalkenylene is unsubstituted or substituted with one or more substituent(s); L is a bond, —CR 1 R 2 —, —O—, —S—, —SO 2 — or —NR 1 —; Y is —CR 3 R 4 —; Z is —(CR 5 R 6 ) n —; n is 2; Ar is a bivalent aryl or heteroaryl radical that is unsubstituted or substituted with one or more substituent(s); R 1 , R 2 , R 3 , R 4 , R 5 and R 6 are independently hydrogen, C 1 –C 4 alkyl or C 2 –C 4 alkenyl, wherein the alkyl or alkenyl is unsubstituted or substituted with one or more substituent(s); R 7 is hydrogen, phenyl, phenylethyl or benzyl wherein the phenyl, phenylethyl or benzyl is unsubstituted or substituted with one or more substituent(s); and R 8 , R 9 , R 10 and R 11 are independently hydrogen, carboxy, hydroxy, halo, nitro, cyano, C 1 –C 4 alkyl or C 1 –C 4 alkoxy; provided that when the compound is of formula I, L is a bond and X is ethyl, then Y is not —CR 3 R 4 —.