Patent ID: 7989478

Claim:
A 2(1H)-pyridinone compound represented by the formula (XI): wherein: X I ′ represents a C2-C4 alkenyl group substituted with a cyano group, an A I ′—R I —O— group (wherein A I ′ represents a C1-C4 alkylthio group, a C2-C4 alkenyl group, a C2-C4 alkynyl group, a C1-C4 alkoxycarbonyl group, a carboxy group or a cyano group, and R I represents a C1-C4 alkylene group), an A II -(y) m -z-NH— group (wherein A II represents a C2-C4 alkenyl group, or a C1-C4 alkyl group substituted with a C1-C4 alkoxy group, a C1-C4 alkoxycarbonyl group, a carboxy group or a cyano group, y represents an oxy group or an imino group, z represents a carbonyl group or a sulfonyl group, and m represents 0 or 1), or an A III -NHCO— group (wherein A III represents a methanesulfonyl group, or a C1-C4 alkyl group substituted with a hydroxy group, a C1-C4 alkoxy group, a C1-C4 alkoxycarbonyl group, a carboxy group or a cyano group); a and b are the same or different, and represent a hydrogen atom or a C1-C4 alkyl group; Y 1 represents a halogen atom, a nitro group, a C1-C4 alkyl group or a C1-C4 alkoxy group; n represents 0, 1 or 2, and when n is 2, Y I s may be different.