Patent ID: 6987118

Claim:
A compound of formula I a prodrug of said compound or a pharmaceutically acceptable salt of said compound or prodrug; wherein X 1 and X 2 are each independently a) hydrogen, b) halo, c) (C 1 –C 4 )alkyl optionally substituted with one to three fluoro or d) (C 1 –C 4 )alkoxy optionally substituted with one to three fluoro; one of X 3 and X 4 is hydrogen and the other is —Y—C(R 1 )(R 2 )—COOH; Y is —O— or —S—; R 1 and R 2 are each independently a) hydrogen or b)(C 1 –C 4 )alkyl; X 5 is —CH 3 or —CF 3 .