Patent ID: 7951799

Claim:
A lactam compound, or a pharmaceutically acceptable salt thereof, represented by Formula (1): wherein R is selected from the group consisting of a lower alkyl group, a lower alkenyl group, a lower alkynyl group or a lower alkoxy group, which may have one to three substituents, Y is either N or CR′, with the proviso that when the bonds indicated by c and d are both single bonds Y is either NH or CHR′, R′ is selected from the group consisting of a hydrogen atom, a lower alkyl group, a lower alkenyl group, a lower alkynyl group, a lower alkoxy group, a lower alkylthio group, a lower alkylamino group, a halogen group, a nitro group, and a cyano group, which may have one to three substituents, U represents C or N, in regard to the bonds indicated by a, b, c and d, and V, i) when U represents C, a represents a double bond, b and d represent single bonds, and c represents either a single bond or a double bond, V represents —X—, or —CH 2 —O—, —O—CH 2 —, —CH═N—, —N═N— or —N═CH— from the side of Y, ii) when U represents N, a and c represent single bonds, b and d represent double bonds, V represents —N—, or —CH—X— from the side of Y, X represents O, S or NH, and the bicyclic fused ring containing U may be substituted with one to three fluorine atoms: wherein said substituent is selected from the group consisting of a halogen, a hydroxyl, a methoxy, an ethoxy, an acetoxy, a methylthio, a methane sulfonyl group, an amino group, a methylamino group, a dimethylamino group, an acetylamino group, and a methoxy carbamoyl group.