A compound is provided which is useful as an activeingredient of an agricultural chemical having superiorantimicrobial activity against various plant diseases andcapable of controlling rice blast and so on at a low dose.A compound or salt thereof represented by thefollowing general formula:(see formula Ia) (see formula Ib)(see formula Ic) or (see formula Id)(wherein, R1 and R2 represent a C1-C6 alkyl group, arylgroup, heteroaryl group, aralkyl group or R1 and R2together represent a C3-C10 cycloalkyl group, R3 and R4represent a hydrogen atom, a C1-C6 alkyl group or R3 and R4together represent a C3-C10 cycloalkyl group, R5represents a hydrogen atom, C1-C6 alkyl group or acylgroup, X represents a halogen atom, a C1-C6 alkyl group,C2-C6 alkenyl group, C2-C6 alkynyl group, aryl group,heteroaryl group, C1-C6 alkoxy group, amino group, acylgroup, cyano group or N-hydroxyalkaneimidoyl group, Yrepresents a substituent selected from the groupconsisting of a halogen atom, C1-C6 alkyl group, C1-C6alkoxy group and hydroxyl group, n represents an integerof 0 to 4, and m represents an integer of 0 to 6).
