| 摘要 |
Compounds of formula <IMAGE> (in which X1 represents a hydrogen, fluorine, chlorine or bromine atom, X2 represents a fluorine, chlorine or bromine atom, X3 represents a chlorine, bromine or iodine atom, one of the radicals A and B represents a carbonyl group and the other represents a methylene, ethylidene or propylidene group and R1 represents a lower alkyl, lower alkenyl or lower alkynyl radical containing up to three carbon atoms) exhibit antiparasitic and pesticidal activity, e.g. against insects, acarids and nematodes. They may be formulated for use against parasites of plants and animals and pests found in premises, including as pharmaceutical compositions. Processes for the preparation of the compounds are described. <IMAGE> |
