Bioassay-guided fractionation of an extract of foliage of Europeanyew (Taxus baccata L.) yieldedtwo new (1−2) and a previously reported(3) taxoid that acted as pyrethroid insecticidesynergists with the black vine weevil (Otiorhynchus sulcatusFab.). Structures of the compoundswere established by spectral methods.
