Patent ID: 8211884

Claim:
A compound of formula (I): wherein: X is CH or N; R 1 is lower alkyl substituted with halogen; R 2 is —CH 2 -aryl, said aryl being unsubstituted or substituted with C(O)OH, or —C(O)—R 3 ; R 3 is -lower alkyl, unsubstituted or substituted with carboxylic acid, —O-lower alkyl, unsubstituted or substituted with C(O)OH, —(CH 2 ) n -cycloalkyl, said cycloalkyl being unsubstituted or substituted with C(O)OH or C(O)O—CH 2 -phenyl, —(CH 2 ) n -aryl, said aryl being unsubstituted or mono- or bi-substituted with C(O)OH, —NH-lower alkyl, —(CH 2 ) n -heterocycloalkyl, said heterocycloalkyl being unsubstituted or substituted with (═O), or —NH(CH 2 ) 2 C(O)OCH 2 CH 3 ; and n is 0, 1 or 2; or a pharmaceutically acceptable salt thereof.