Patent ID: 7951806

Claim:
A compound represented by formula (I), or a salt or solvate thereof wherein —R 1 and R 2 , the same or different, each represent a hydrogen atom, halogen atom, alkyl, cycloalkyl, cycloalkylalkyl, alkenyl, cycloalkenyl, alkynyl, hydroxyl, alkoxy, cycloalkoxy, alkenyloxy, cycloalkenyloxy, aryloxy, aralkyl, aralkyloxy, heterocyclic group, heterocyclic-alkyl, or heterocyclic-alkyloxy group; or substituted or unsubstituted aryl group; or amino, carbamoyl, cyano, carboxy or alkoxycarbonyl group that may be substituted or unsubstituted with 1 to 2 substituents; and may adjoin with each other to form a ring; —R 3 is a hydrogen atom; or substituted or unsubstituted alkyl, alkenyl, alkynyl, cycloalkyl, aryl or aralkyl group; —X is a sulfur atom or —C(R 5 )═C(R 6 )—, wherein R 5 and R 6 each represent a hydrogen atom, halogen atom, or substituted or unsubstituted alkyl or alkoxy group; —B is a carboxy, alkoxycarbonyl, 1H-tetrazol-5-yl, 4,5-dihydro-5-oxo-4H-1,2,4-oxadiazol-3-yl, 4,5-dihydro-5-thioxo-4H-1,2,4-oxadiazol-3-yl, or 4,5-dihydro-5-oxo-1,2,4-thiadiazol-3-yl group; -L is substituted or unsubstituted alkylene (some carbon atoms in the alkylene may form a cycloalkyl ring), alkenylene, alkynylene, cycloalkylene, alkyleneoxyalkylene, alkylenethioalkylene, alkylene-SO-alkylene or alkylene-SO 2 -alkylene, or alkylene-N(R 9 )-alkylene group, wherein R 9 is a hydrogen atom, or a substituted or unsubstituted alkyl group; -n is an integer of 0 or 1; -A is —COR 10 wherein R 10 is N(R 14 )(R 15 ), wherein R 14 and R 15 , the same or different, each represent a hydrogen atom, a substituted or unsubstituted alkyl, alkenyl, cycloalkenyl, alkynyl, bicycloalkyl, bicycloalkenyl, adamanthyl, aryl, heterocyclic ring, aralkyl (including diphenylalkyl) or heterocyclic-alkyl group, or R 10 is a group represented by the following formula: wherein m is an integer of 1 to 4, Y represents a nitrogen atom, CH, C(R 16 ′)—, C(OH)— or CH—O—; R 16 and R 16 ′, the same or different, each represent a hydrogen atom, a substituted or unsubstituted alkyl, cycloalkyl, alkenyl, cycloalkenyl, alkynyl, bicycloalkyl, bicycloalkenyl, adamanthyl, aryl or aralkyl group (including diphenylalkyl); and R 21 and R 21 ′, the same or different, each represent a hydrogen atom, a substituted or unsubstituted alkyl, or phenyl group.