Patent ID: 8314240

Claim:
A compound of the formula (I) or a salt thereof: wherein R 1 and R 2 are combined with the two adjacent carbon atoms to which they each bind to form a cyclopentene ring; R 3 is 2-fluoropropyl, 2-fluorobutyl, 2,2-difluoroethyl, or 3-fluoro-2-methylpropyl; L is lower alkylene; A is pyridyl which may be substituted and B is phenylene which may be substituted or pyridinediyl which may be substituted, or A is phenyl which may be substituted or pyridyl which may be substituted and B is pyridinediyl which may be substituted; X is —CO 2 R 0 , —CO 2 H, or —CO—NH—SO 2 —R 0 ; and R 0 is lower alkyl.