TAXAYUNTIN,A NEW TETRACYCLIC TAXANE FROM THE LEAVES OF TAXUS YUNNANENSIS

摘要

A new skeleton taxane diterpene,taxayuntin,was isolated from the leaves and stems ofTaxus yunnanensis.Its structure was determined by spectroscopic methods(MS,1H NMR,13C NMR,1H-1H COSY,1H-13C COSY and 13C-1H COLOC)and X-ray diffraction.