Cinnamoyl derivatives and use thereof

A composition comprising a 2(1H)-pyridinone compound represented by the formula (XVIII):

• wherein XIII′ represents a C2-C4 alkyl group, or a C1-C4 alkyl group substituted with a halogen atom or a C1-C4 alkoxy group, or a C2-C4 alkenyl group, or a C2-C4 alkenyl group, or a C2-C4 alkoxy group, or a RI—S(O)I-group (wherein RI represents a C1-C4 alkyl group, and l represents an integer of 0 to 2), or a cyano group, or a carboxy group, or a C1-C4 alkoxycarbonyl group, a (RII)2N-group (wherein RII represents a C2-C4 alkyl group), or a RI—CO—NH-group (wherein RI is as defined above), or a RIO—CO—NH-group (wherein RI is as defined above), or a RINH—CO—NH-group (wherein RI is as defined above), or a (RI′)2N—CO-group (wherein RI′ represents a hydrogen atom or a C1-C4 alkyl group), or a RB-group (wherein B represents an oxygen atom or a sulfur atom, and R represents a C1-C4 alkyl group substituted with a halogen atom), XIII″represents a hydrogen atom, a halogen atom, a C1-C4 alkyl group, or a C1-C4 alkoxy group, m represents 1 or 2, when m is 2, XIII″'s may be different, and rII and rII′ are the same or different, and represent a hydrogen atom or a C1-C4 alkyl group;
• and an inert carrier.