Patent ID: 7622502

Claim:
A compound of Formula I or a pharmaceutically acceptable salt thereof, wherein: n is an integer from 1 to 6; R 1 is selected from the group consisting of: (a) S(O) 2 CH 3 and (b) S(O) 2 NH 2 , R 2 and R 3 each are independently selected from the group consisting of: (a) hydrogen, (b) halo, (c) C 1-6 alkoxy, (d) C 1-6 alkylthio, (e) CN, (f) CF 3 , (g) C 1-6 alkyl, and (h) N 3 ; R 4 is selected from the group consisting of (a) C 1-4 alkyl, optionally substituted with 1 to 3 halo groups, (b) phenyl, naphthyl or a 5- or 6-membered aromatice heterocycle, each optionally substituted with 1 to 3 halo groups, (c) —O—R 5 , and (b) —(CH 2 ) m —N(R 6 )(R 7 ); m is an integer from 1 to 4; and R 5 , R 6 and R 7 are each independently selected from the group consisting of hydrogen and C 1-4 alkyl, optionally substituted with 1 to 3 halo groups.