New 14-Hydroxy-taxane and 2α,20-Epoxy-11(15→1)abeotaxane from the Needles of Taxus canadensis

抄録

Two new taxanes were isolated from the needles of Taxus canadensis. Their structures were established as 10β,13α-diacetoxytaxa-4(20),11-diene-5α,9α,14β-triol (1) and 4α,13α-diacetoxy-2α,20-epoxy-11(15→1)abeotaxa-11,15-diene-5α,7β,9α,10β-tetraol (2) on the basis of a spectroscopic analysis.