| abstract |
Compounds having the formula (I):n n in which: 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 -, in which n is 3,4 or 5; and A is aromatic heterocyclic; and salts thereof, are valuable agricultural and horticultural anthelmintic, acaricidal and insecticidal agents. |