Benzimidazol- or indol-aminoacetonitrile derivatives for parasite control

摘要

The invention relates to compounds of the general formula wherein R₁, R₂, R₃, R₄, R₅, R₆, R₇, X, Y and a have the significances given in the patent, and optionally the enantiomers thereof. The active ingredients have advantageous pesticidal properties. They are especially suitable for controlling parasites on warm-blooded animals.