Patent ID: 7816540

Claim:
A compound of formula (I): or a pharmaceutically acceptable salt thereof, wherein: R 1 is selected from the group consisting of: R 2 is hydrogen or lower alkyl; R 3 is cyclohexyl or bicyclo[2.2.1]heptyl; R 4 is selected from the group consisting of: (1) phenyl which is substituted at the 4-position by halogen, cyano or fluoro-lower alkyl, and (2) pyridyl which is substituted with 1 or 2 substituents independently selected from the group consisting of halogen, amino, cyano and lower alkoxy; R 5 and R 6 independently from each other are hydrogen or fluoro; R 7 and R 9 independently from each other are selected from the group consisting of hydrogen, lower alkyl, halogen, lower alkoxy, fluoro-lower alkyl, fluoro-lower alkoxy and cyano; R 8 is selected from the group consisting of: (1) —(CR 12 R 13 ) n —COOH wherein n is 0, 1 or 2 and R 12 and R 13 independently from each other are hydrogen or lower alkyl, or R 12 and R 13 together with the carbon atom they are attached to form a cycloalkyl ring, and (2) —O—(CR 14 R 15 ) p —COOH wherein p is 1 or 2 and R 14 and R 15 independently from each other are hydrogen or lower alkyl, or R 14 and R 15 together with the carbon atom they are attached to form a cycloalkyl ring; R 10 is hydroxy or —(CH 2 ) p —COOH wherein p is 0, 1 or 2; m is 0 or 1; and R 11 is —COOH.