Patent ID: 8063034

Claim:
A compound represented by the following formula (I) or a salt thereof: wherein the ring A represents a benzene ring, a thiophene ring, or a pyridine ring; R a represents a hydrogen atom, a halogen atom, an alkyl group, or an alkoxy group; the ring B represents a pyridine ring, a pyrimidine ring, or a quinoline ring; the ring C represents a benzene ring, a pyridine ring, a quinoline ring, or an isoquinoline ring; X represents an oxygen atom or a sulfur atom; when X is an oxygen atom, Y represents a sulfur atom or an oxygen atom; when X is a sulfur atom, Y represents a sulfur atom; R 1 represents a hydrogen atom, a halogen atom, an amino group, a cycloalkylamino group, an alkylcarbonylamino group, an alkyloxycarbonylamino group, an alkylaminocarbonyl group, or a non-aromatic heterocyclic group; R 2 and R 2′ are the same or different and represent a hydrogen atom, a halogen atom, an alkyl group, a halogeno-alkyl group, or a halogeno-alkoxy group.