| 摘要 |
The present invention relates to the use of derivatives of 2,3-diaminomaleonitrile, some of which are known, of the formula …<IMAGE>… as an agent against animal pests and, in particular, against arachnids, where, in formula (I),… X represents hydrogen, halogen, haloalkyl or CN,… R<1>, R<2>, R<3> and R<4> can be identical or different and… represent hydrogen, optionally substituted alkyl, optionally substituted alkoxy, halogen, CN, NO2, optionally substituted dialkylamino, alkoxycarbonyl, optionally substituted alkylthio, optionally substituted alkylthionyl, optionally substituted alkylsulphonyl, OH, SH or NH2, and the substituents Ra, Rb, Rc and Rd can in each case assume one of the composite meanings given in the text of the application. |
