The invention relates to novel compounds of the formula (I) in which the R1, R2a, R2b, R3, A1, A2, A3, A4 and n radicals are each as defined above, to their use as acaricides and/or insecticides for controlling animal pests and to processes and intermediates for their preparation.本發明係有關一種新穎之式(I)化合物其中R1、R2a、R2b、R3、A1、A2、A3、A4與n基團分別如上述定義,及其作為殺蜱蟎劑及/或殺昆蟲劑用於控制動物害蟲之用途,及其製法與用於其製法之中間物。