Patent ID: 7888386

Claim:
A compound of formula I: where: a is 0 to 5; each R 1 is independently selected from halo, —C 1-6 alkyl, —C 2-6 alkynyl, —O—C 1-6 alkyl, —C 1-4 alkylene-O—C 1-4 alkyl, —C 0-1 alkylene-phenyl, —O—C 0-3 alkylene-phenyl, —C 0-6 alkylene-OH, —CN, —C 0-2 alkylene-COOH, —CHO, —C(O)—C 1-6 alkyl, —C(O)O—C 1-4 alkyl, —CH 2 SH, —S—C 1-6 alkyl, —C 1-4 alkylene-S—C 1-4 alkyl, —SO 2 —C 1-6 alkyl, —SO 2 NR a R b , —NHSO 2 R a , —C 0-1 alkylene-NR a R b , —NHC(O)—C 1-6 alkyl, —C(O)NR a R b , and —NO 2 ; R 2 through R 6 are independently selected from H, halo, —C 1-6 alkyl, —C 2-6 alkynyl, —O—C 1-6 alkyl, —C 1-4 alkylene-O—C 1-4 alkyl, —C 0-1 alkylene-phenyl, —O—C 0-3 alkylene-phenyl, —C 0-6 alkylene-OH, —CN, —C 0-2 alkylene-COOH, —CHO, —C(O)—C 1-6 alkyl, —C(O)O—C 1-4 alkyl, —CH 2 SH, —S—C 1-6 alkyl, —C 1-4 alkylene-S—C 1-4 alkyl, —SO 2 —C 1-6 alkyl, —SO 2 NR a R b , —NHSO 2 R a , —C 0-1 alkylene-NR a R b , —NHC(O)—C 1-6 alkyl, —C(O)NR a R b , and —NO 2 ; R a and R b are independently H or —C 1-4 alkyl; each alkyl in R 1 through R 6 is optionally substituted with 1 to 5 fluoro atoms; and each phenyl in R 1 through R 6 is optionally substituted with 1 or 2 groups independently selected from halo, —C 1-6 alkyl, and —O—C 1-6 alkyl; or a pharmaceutically acceptable salt thereof.