Patent ID: 8003656

Claim:
A compound of the formula: or a pharmaceutically acceptable salt thereof, wherein R 2 is hydrogen, C 1 -C 4 alkyl, C 1 -C 4 haloalkyl or C 3 -C 5 cycloalkyl, Ar is phenyl or a 5- or 6-membered heteroaryl, each of which is substituted with from 0 to 4 substituents that are independently chosen from halogen, cyano, amino, nitro, C 1 -C 6 alkyl, C 2 -C 6 alkenyl, C 2 -C 6 alkynyl, C 1 -C 6 haloalkyl, C 1 -C 6 hydroxyalkyl, C 1 -C 6 alkoxy, C 1 -C 6 haloalkoxy, (C 3 -C 7 cycloalkyl)C 0 -C 4 alkyl, and mono- or di-(C 1 -C 6 alkyl)amino; and R 3 represents from 0 to 4 substituents that are independently chosen from halogen, hydroxy, cyano, amino, nitro, C 1 -C 6 alkyl, C 2 -C 6 alkenyl, C 2 -C 6 alkynyl, C 1 -C 6 haloalkyl, C 1 -C 6 hydroxyalkyl, C 1 -C 6 alkoxy, C 1 -C 6 haloalkoxy, (C 3 -C 7 cycloalkyl)C 0 -C 4 alkyl, mono- or di-(C 1 -C 6 alkyl)amino, and mono- or di-(C 1 -C 6 alkyl)aminosulfonyl.