Pharmaceutical compositions useful for treating tick infestation in animals which contain 2-aryliminopyrrolidines or their salts as the active agent

摘要

2-Phenyliminopyrrolidines of the formula: CH2--CH2 ¦-¦--R3 N=CCH2 ANGLE N (I) ¦B ¦ C=C ANGLE ¦ AD or salts thereof, WHEREIN R1 is halogen, R2 is hydrogen, halogen, alkyl of 1 to 6 carbon atoms, difluoromethyl or trifluoromethyl, R3 is hydrogen or alkyl, preferably lower alkyl, N IS AN INTEGER FROM 1 TO 4, AND A, B and D each represent hydrogen, alkyl of 1 to 6 carbon atoms, alkenyl of 2 to 6 carbon atoms, or A and B, or B and D are linked to each other to form a ring, provided that at least one of A, B and D is alkyl or alkenyl, ARE USEFUL AS ACARICIDES.