13-(SUBSTITUTED THIO) ACETOXYMILBEMYCIN DERIVATIVES, THEIR PREPARATION AND THEIR AGROCHEMICAL USES

摘要

Compounds having the formula (I): wherein: R1 is methyl, ethyl or isopropyl; R2 is alkyl, aralkyl, cycloalkyl, cycloalkylmethyl, aryl, heterocyclic, or heterocyclic-substituted thio; R3 is hydrogen, methyl or ethyl; or R2 together with R3 is -(CH2)n-, wherein n is 3,4 or 5; and A is aromatic heterocyclic; and salts thereof, are valuable agricultural and horticultural anthelmintic, acaricidal and insecticidal agents.