N-3-(5-Trifluoromethyl-pyridyl-2-oxy)phenyl-N'-benzoylureas for combating helminths in livestock

摘要

N-3-(5-trifluoromethyl-2-pyridyloxy)phenyl-N'-benzoylurea derivatives of the formula I …IMAGE… in which… R1 is hydrogen, C1-C2-alkoxy, C1-C2-alkylthio, C1-C2-alkyl or halogen;… R2 is hydrogen or halogen;… R3 is hydrogen or halogen;… R4 is hydrogen, C1-C2-alkyl or halogen; and… R5 is hydrogen or halogen; are used for controlling helminths, especially nematodes and trematodes, in domestic and productive livestock.