Patent ID: 8252781

Claim:
A 1,2-diazetidin-3-one derivative represented by the following general formula (I) or salt thereof: wherein A ring represents a saturated C 3-10 carbocyclic group, wherein B ring represents a C 3-8 cycloalkyl group, C 3-8 cycloalkenyl group, C 6-14 aryl group or a 5- to 14-membered heteroaryl group, wherein R 1 , R 2 and R 3 are the same or different and represent a hydrogen atom, halogen atom, hydroxyl group, carboxyl group, carbamoyl group or C 1-6 alkyl group, wherein R 4 and R 5 are the same or different and represent a hydrogen atom or C 1-6 alkyl group, wherein R 6 , R 7 and R 8 are the same or different and represent a hydrogen atom, halogen atom, hydroxyl group, nitro group, cyano group, amino group which may be substituted with a sulfonyl group or acyl group, C 1-6 alkyl group, halo C 1-6 alkyl group, C 1-6 alkoxy group which may be substituted with a C 1-6 alkoxy group, C 6-10 aryl group, C 2-6 alkanoyloxy group, C 1-6 alkylthio group, C 1-6 alkylsulfinyl group or C 1-6 alkylsulfonyl group, or R 6 and R 7 may together form a C 1-3 alkylenedioxy group, wherein L represents a single bond, C 1-6 alkylene chain, C 2-6 alkenylene chain, —(C 1-6 alkylene)-O—, —CO—X— or —SO 2 —Y—, wherein X represents a single bond, —N(R 9 )—, —O—(C 1-6 alkylene)-, —(C 1-6 alkylene)-O—, —(C 1-6 alkylene)-O—(C 1-6 alkylene)- or —(C 1-6 alkylene)-S—, wherein R 9 represents a hydrogen atom, C 1-6 alkyl group or acyl group, and wherein Y represents a single bond or C 1-6 alkylene chain.