Patent ID: 7576086

Claim:
A compound of formula I: wherein Ar 1 and Ar 2 independently represent: R 1 , R 2 and R 3 each represents hydrogen, a C 1 -C 3 alkyl group, a C 5 or C 6 cycloalkyl group, a phenyl, substituted phenyl, methoxy, ethoxy, amino, substituted amino, halogen, carboxylic acid, carboxylic ester, nitryl or acetonitrile group; Y represents C, N, or O; Z represents a five or six-member carbocyclic ring, or a five or six-member heterocyclic ring where at least one carbon is replaced by S, N or O; n represents 1, 2 or 3; m represents 1, 2 or 3; in the form of a free base or a salt thereof.