Abstract: A compound of formula (I) (in the formula (I), R1 represents a substituted or unsubstituted C1-6 alkyl group or the like, R2 represents a substituted or unsubstituted 5- or 6-membered heteroaryl group, R3 represents a substituted or unsubstituted C1-6 alkyl group, a substituted or unsubstituted C1-6 alkoxycarbonyl group or the like, Y represents an oxygen atom or NH, A1 represents a sulfur atom, an oxygen atom, or NR4, R4 represents a C1-6 alkyl group, A2 is a carbon atom or a nitrogen atom, X represents a substituent, n represents the chemically acceptable number of X, and is an integer of 0 to 3, and, when n is 2 or more, X may be identical to or different from each other), or a salt thereof is provided.

Abstract: The present invention provides a compound represented by formula (I) (in the formula, R1 to R4 each represent a hydrogen atom, an unsubstituted or G1-substituted C1-6 alkyl group or the like, A represents an oxygen atom or the like, Cy represents a C6-10 aryl group or the like), an N-oxide compound thereof, a tautomer or salt thereof. The present invention also provides an agricultural and horticultural fungicide, harmful organism control agent and insecticidal/acaricidal agent containing at least one compound selected from the group consisting of a compound represented by formula (I), a tautomer and salt thereof, as an active ingredient.

Abstract: The present invention provides a compound represented by formula (I) (in the formula, R1 to R4 each represent a hydrogen atom, an unsubstituted or G1-substituted C1-6 alkyl group or the like, A represents an oxygen atom or the like, Cy represents a C6-10 aryl group or the like), an N-oxide compound thereof, a tautomer or salt thereof. The present invention also provides an agricultural and horticultural fungicide, harmful organism control agent and insecticidal/acaricidal agent containing at least one compound selected from the group consisting of a compound represented by formula (I), a tautomer and salt thereof, as an active ingredient.