The invention relates to compounds of the general formula wherein either R signifies C1-C6-alkyl, halo-C1-C6-alkyl, C1-C6-alkoxy-C2-C6-alkyl or halo-C1-C6-alkoxy-halo-C2-C6-alkyl; and X1 signifies a single bond, O, S, S(O) or S(O)2; or R signifies halogen and X1 signifies a single bond; X2 signifies CN, halogen, C1-C6-alkyl, halo-C1-C6-alkyl, C1-C6-alkoxy, halo-C1-C6-alkoxy, C1-C6-alkoxycarbonyl, C1-C6-alkylthio, C1-C6-alkylsulfinyl, C1-C6-alkylsulfonyl, C1-C6-alkylsulfonylamino, halo-C1-C6-alkylsulfonylamino, OH, NH2, COOH, CONH2, C1-C6-alkylaminocarbonyl or C1-C6-alkylcarboxamido, whereby if n is greater than 1, X2 may differ from each other; m signifies 1, 2, 3 or 4; and n is 1, 2, 3, 4 or 5, and optionally the enantiomers thereof. The active ingredients have advantageous pesticidal properties. They are especially suitable for controlling parasites on warm-blooded animals.