Patent ID: 7807691

Claim:
A compound of the formula: wherein, R 1 represents CN; R 2 represents halo, halo(C 1 -C 4 )alkyl, or (C 1 -C 4 )alkyl; R 3 represents H or (C 1 -C 4 )alkyl; R 4 represents a phenyl group optionally substituted with a substituent selected from the group consisting of halo, methyl, ethyl, methoxy, ethoxy, CF 3 , CHF 2 , OCF 3 , —SR 7 , or —SO 2 R 8 ; R 4a represents hydrogen or methyl; R 5 represents H, OH, CH 2 OH, halo, or (C 1 -C 4 )alkyl; R 6 represents H, OH, or (C 1 -C 4 )alkyl, provided that when R 5 and R 6 each represent OH, they are not bound to the same carbon atom; and R 7 and R 8 each independently represent at each occurrence (C 1 -C 4 )alkyl, or a pharmaceutically acceptable salt thereof.