| 摘要 |
Providing milbemycin derivatives having insecticidal, acaricidal and/or anthelmintic activities, particularly strong insecticidal activity against fleas. (Device for solving the problem( Milbemycin derivatives represented by the general formula (I) below: (see formula) In this formula, R1 represents a methyl group, an ethyl group, an isopropyl group or sec-butyl group: X represents a carbonyl group or a methylene group: Z represents a group having a formula of =C= (R2)2 or a formula of =C=(CH2) m (In this formula, R2 represents a (C1-C3)-alkyl group, and m represents an integer of from 2 to 5.(: R3 represents a halogen atom, a cyano group, a nitro group, an amino group, an optionally substituted (C1-C4)-alkyl group, a (C!-C4)-alkoxy group, a (C1-C3)-alkoxy-C2-C3)-alkoxy group, an acyl-substituted amino group; a sulfonyl-substituted amino group.
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