Six taxine alkaloids were isolated from Taxus baccata
needles and partially separated. An
HPLC method for the analysis of the taxine fraction was developed.
By NMR and deamination/hydrolysis studies it was established that the taxine fraction consisted
mostly of taxicin-I and
taxicin-II derivatives in a variable ratio. Four of the six taxine
alkaloids isolated have not
been reported before. All of the alkaloids were found to be
unstable under neutral and basic
conditions, and some of them were very easily
interconverted.
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