Patent ID: 8729104

Claim:
A compound represented by structural formula I the pyridyl-N-oxide analog of formula I, or a pharmaceutically acceptable salt thereof wherein: R 1 is R 2 is selected from the group consisting of (a) —C 1-6 alkyl optionally substituted with 1-3 of fluoro, (b) —C 3-6 cycloalkyl and n is an integer selected from 0, 1, 2 and 3; R 3 is selected from the group consisting of —H, —F, —OH, —CH 3 and —CF 3 ; R 4 is selected from the group consisting of —H and —C 1-4 alkyl; R 5 is selected from the group consisting of —H and —CH 3 ; and R 7 is selected from the group consisting of —H, —C 1-6 alkyl optionally substituted with 1-3 fluoro, —C 3-6 cycloalkyl optionally substituted with 1-3 fluoro, —COC 1-6 alkyl and —COC 3-6 cycloalkyl; R 8 is selected from the group consisting of —H, —C 1-6 alkyl optionally substituted with 1-3 fluoro, and —C 3-6 cycloalkyl optionally substituted with 1-3 fluoro; and R 9 is selected from the group consisting of —CH 3 and —F.