Patent ID: 7482461

Claim:
A compound of formula I wherein R is H, halogen, haloalkyl, or an alkyl group optionally substituted with 1-3 substituents selected from halogen, alkyl, haloalkyl, alkoxy or haloalkoxy groups; R 1 is an aryl group optionally substituted with 1-3 substituents selected from halogen atoms, alkyl, haloalkyl, alkoxy or haloalkoxy groups; R 2 is H or an alkyl group optionally substituted with 1-3 substituents selected from halogen, alkyl, haloalkyl, alkoxy or haloalkoxy groups; R 3 and R 4 are each H; n is 0 or an integer of 1; and R 5 is H or an alkyl, alkenyl, alkynyl or cycloalkyl, group each group optionally substituted with 1-3 substituents selected from halogen, alkyl, haloalkyl, alkoxy or haloalkoxy groups; or a stereoisomer thereof or a pharmaceutically acceptable salt thereof.