23728237861456A compound represented by formula (I) or a pharmaceutically acceptable salt thereof. (In formula (I): L represents NRR SR SOR a substituted or unsubstituted alkyl or a substituted or unsubstituted alkenyl; R represents a hydrogen atom a substituted or unsubstituted alkyl a substituted or unsubstituted alkenyl a substituted or unsubstituted alkynyl or the like; R represents a substituted or unsubstituted alkyl a substituted or unsubstituted alkenyl a substituted or unsubstituted alkynyl or the like; R represents a hydrogen atom a substituted or unsubstituted alkyl a substituted or unsubstituted alkenyl a substituted or unsubstituted alkynyl or the like; R represents a hydrogen atom a substituted or unsubstituted alkyl (but not an unsubstituted methyl or an unsubstituted ethyl) a substituted or unsubstituted alkenyl a substituted or unsubstituted alkynyl or the like; Y represents a substituted or unsubstituted alkyl (but not an unsubstituted methyl or an unsubstituted ethyl) a substituted or unsubstituted alkenyl a substituted or unsubstituted alkynyl a substituted or unsubstituted aryl or the like; Z represents CR= or N=; R represents a hydrogen atom or a substituted or unsubstituted alkyl; and R R and R are each independently a hydrogen atom a halogen a hydroxyl a cyano a nitro a carboxy a substituted or unsubstituted alkyl a substituted or unsubstituted alkenyl a substituted or unsubstituted alkynyl or the like.)