Salts from imidazoline derivatives and their use as a parasite control agent

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PCT No. PCT/EP97/00475 Sec. 371 Date Aug. 5, 1998 Sec. 102(e) Date Aug. 5, 1998 PCT Filed Feb. 3, 1997 PCT Pub. No. WO97/30043 PCT Pub. Date Aug. 21, 1997The present invention relates to salts of imidazoline derivatives of the formula I in which R represents hydrogen or alkyl, Y represents nitro or cyano, W represents an optionally substituted 5- or 6-membered heterocyclic radical and Z represents one equivalent of an alkali metal or alkaline earth metal or of an [NR1R2R3R4] grouping, wherein R1, R2, R3 and R4 are identical or different and represent hydrogen, alkyl, optionally substituted cycloalkyl or optionally substituted benzyl, and to their preparation and their use as agents for controlling pests.