Patent ID: 7947717

Claim:
A compound of formula I: wherein R 1 is phenyl, pyridyl, or thiophenyl optionally substituted with 1, 2, or 3 substituents independently selected from halo, C 1-3 alkyl, C 1-3 alkoxy, (aryl)C 1-3 alkoxy optionally substituted with halo, —CF 3 , —NO 2 , —CO 2 H, —SO 2 NH 2 , —SO 2 NR x R Y wherein R x and R y taken together with the nitrogen to which they are attached form a morpholino or piperidino group, or an ortho fused tetrahydrofuran optionally substituted with C 1-3 alkyl; R 2 is —CH 2 CO 2 H, —(CH 2 ) 1-3 SO 3 H, or heterocycle; wherein any CH 2 or heterocycle of R 2 is optionally substituted with 1 or 2 substituents independently selected from halo, —OR a , —NO 2 , —NH 2 , —SO 2 NH 2 , —CO 2 H, —CONH 2 , —CO 2 CH 3 , —OCF 3 , or —CF 3 ; wherein R a is hydrogen, or C 1-4 alkyl; and R 3 is phenyl optionally substituted with 1-5 halo groups; or a pharmaceutical acceptable salt thereof.