Abstract
A novel taxane diterpenoid with a rearranged 5/7/6-membered ring system was isolated from seeds of the Chinese yew, Taxus yunnanensis. Its structure was established as 9alpha,13alpha-diacetoxy-10beta-benzoxy-5alpha- cinnamoyl-11(1 5-->1)-abeotaxa-4(20),11-dien-15-ol on the basis of a spectroscopic analysis. Its relative stereochemistry is proposed from the results of NOESY experiments.
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