New oxetane-type taxanes from Taxus wallichiana Zucc.
Abstract
The needles of Taxus wallichiana Zucc. gave the novel oxetane-type taxane diterpenoids 2 and 5, whose structures have been established on the basis of spectroscopic data and chemical reactions. The acidcatalysed rearrangement of 10-deacetylbaccatin III has been investigated.