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A new taxoid, decinnamoyl-taxinine B-11,12-oxide, was isolated from the leaves and stems of Taxus yunnanensis. This is the first example of an 11,12-epoxy taxoid isolated from the yew tree.
Two new taxane diterpenoids, 1-hydroxy-2-deacetoxytaxinine J and 7,2 -bisdeacetoxyaustrospicatine, were isolated from the barks of Taxus wallichiana together with 13 known compounds, including taxol. Their structures were elucidated and identified by spectroscopic methods. The structure of 7,2 -bisdeacetoxyaustrospicatine was further confirmed by X-ray crystallographic analysis.
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