Patent ID: 8598206

Claim:
A compound having the following formula or a pharmaceutically acceptable salt thereof; wherein X is selected from the group consisting of H, CO 2 H, and CO 2 R′; n ranges from 0 to 3; and R is selected from the group consisting of phenyl, pyridyl, tetrazolyl, and piperidinyl; wherein R may be unsubstituted or may be substituted by one or more substituents selected from the group consisting of halogen, R′, OR′, SR′, S═(O)R′, S(═O) 2 R′, S(═O) 2 NHR′, S(═O) 2 NR′ 2 , CN, NH 2 , NHR′, NR′ 2 , NHS(═O) 2 R′, NHC(═O)R′, NHC(═O)OR′, NHC(═O)NHR′, NHC(═O)NR′ 2 , C(═O)R′, C(═O)CH 2 OR′, CO 2 R′, C(═O)NHR′, and C(═O)NR′ 2 ; wherein when R is pyridyl it may be a pyridine N-oxide; and wherein each R′ is independently CF 3 or C 1 to C 4 lower alkyl or cycloalkyl.