The invention relates inter alia to novel compounds of the general formula (I) in which the A1-A4, T, W, Q, R1 and B1-B4 radicals are each as defined in the description. Also described are processes for preparing the compounds of the formula (I). The inventive compounds are especially suitable for controlling insects, arachnids and nematodes in agriculture, and ectoparasites in veterinary medicine.本發明特別關於新穎之通式(I)化合物其中A1-A4、T、W、Q、R1及B1-B4殘基各如本說明書中所定義者。亦說明用於製備該式(I)化合物之方法。本發明之化合物尤其適合於農業中用來控制昆蟲類、蜘蛛類及線蟲類,及於獸醫用藥中控制外寄生蟲。