Patent ID: 7919509

Claim:
A 2-oxochromene derivative represented by the following general formula (1) or salt thereof: (wherein R 1 represents a halo C 1-8 alkyl group; R 2 , R 3 , and R 4 are either same or different and represent a hydrogen atom, halogen atom, C 1-8 alkyl group, halo C 1-8 alkyl group, C 2-8 alkenyl group, C 2-8 alkynyl group, C 1-8 alkoxy group C 1-8 acyl group, nitro group, cyano group, carboxyl group, carbamoyl group, or C 6-10 aryl C 1-8 alkyl group, wherein the C 6-10 aryl may have 1 to 3 substituents selected from the following group A; R 5 and R 6 are either same or different and represent a hydrogen atom, C 1-8 alkyl group, C 3-8 cycloalkyl group, halo C 1-8 alkyl group, C 6-10 aryl group or 5- to 11-membered heterocyclic group, wherein the C 6-10 aryl group and 5- to 11-membered heterocyclic group may have 1 to 3 substituents selected from the following group A, and R 5 and R 6 may together form a C 3-8 cycloalkyl ring; L represents a C 2-10 alkyl chain, C 2-10 alkenyl chain, or C 2-6 alkyl-O—C 2-6 alkyl chain; X represents —O— or —N(R 7 )—; R 7 represents a hydrogen atom or C 1-8 alkyl group; Y represents an O, S, —CH(R 8 )—, —CH 2 CH(R 9 )—, —CH 2 O—, or) —N(R 10 )—; R 8 and R 9 are either same or different and represent a hydrogen atom or C 1-8 alkyl group; R 10 represents a hydrogen atom, C 1-8 alkyl group that may be substituted with a C 1-8 alkoxycarbonyl group, halo C 1-8 alkyl group, C 6-10 aryl group, or 5- to 11-membered heterocyclic group, wherein the C 6-10 aryl group and 5- to 11-membered heterocyclic group may have 1 to 3 substituents selected from the following group A), [Group A: halogen atom, C 1-8 alkyl group, halo C 1-8 alkyl group, C 2-8 alkenyl group, C 2-8 alkynyl group, C 3-8 cycloalkyl group, C 1-8 alkoxy group, halo C 1-8 alkoxy group, C 1-8 acyl group, nitro group, amino group, mono C 1-6 alkylamino group, di C 1-6 alkylamino group, cyano group, hydroxy group, carboxyl group, C 1-8 alkoxycarbonyl group, carbamoyl group, C 6-10 aryl group, 5- to 11-membered heterocyclic group, C 1-6 alkylthio group, C 1-6 alkylsulfonyl group, C 6-10 arylthio group, C 6-10 arylsulfonyl group, tetrahydropyranyloxy group, and C 1-6 alkylenedioxy group].