Patent ID: 7879826

Claim:
A method for treating pain in a mammal, comprising the step of: administering to said mammal a therapeutically effective amount of at least one compound of formula (I) or a pharmaceutically acceptable salt thereof: wherein; A is alkenyl of 1 to 4 carbon atoms, or alkenylenyl of 2 to 4 carbon atoms; R 1 and R 2 are, independently, hydrogen, or C 5 to C 7 aryl optionally substituted with 1 to 2 substituents, independently, selected from the group consisting of —C(O)R 3 , halogen, cyano, nitro, hydroxyl group, C 1 -C 6 alkyl group, and C 1 -C 6 alkoxy group, with the proviso that at least one of R 1 and R 2 is not hydrogen; R 3 is, independently, hydrogen, —OR 4 , alkyl, aryl, or heteroaryl, R 4 is hydrogen, alkyl, aryl, or heteroaryl, R 5 and R 6 are, independently, hydrogen, alkyl, OH, alkoxy, or C 5 to C 7 aryl; wherein any R 3 to R 6 group having an aryl or heteroaryl moiety can optionally be substituted on the aryl or heteroaryl moiety with 1 to about 5 substituents, independently, selected from the group consisting of halogen, cyano, nitro, hydroxyl, C 1 -C 6 alkyl, and C 1 -C 6 alkoxy.