Patent ID: 7414062

Claim:
A method for treating pain in an animal, comprising administering to an animal in need thereof an effective amount of a compound or a pharmaceutically acceptable salt of a compound of formula I(a): or a pharmaceutically acceptable salt thereof, wherein: R 1 is hydrogen, —COOH, —COOR3, —C(O)NH 2 , —C(O)NH(C 1 -C 4 alkyl), —C(O)N(C 1 -C 4 alkyl)(C 1 -C 4 alkyl), —CN, —N(H)S(O) 2 (C 1 -C 4 alkyl), or R 2 is —COOH, —COOR 3 or R 3 is —(C 1 -C 6 alkyl), benzyl, phenyl, or —(C 3 -C 6 cycloalkyl); n is 0 when R 1 is hydrogen, and n is an integer ranging from 1 to 4 when R 1 is other than hydrogen; and m is an integer ranging from 0 to 4.