The invention relates to novel compounds of the formula (I) in which R1, R2, R3, R4, A1, A2, X and n have the definitions given above, to the use thereof as acaricides and/or insecticides for controlling animal pests and to processes and intermediates for preparation thereof.本發明係關於新穎式(I)化合物 其中R1、R2、R3、R4、A1、A2、X及n具有本文給定之定義,關於其作為控制動物害蟲之殺蟎劑及/或殺昆蟲劑之用途,及關於其製備方法及中間產物。