Three new taxane diterpenoids from the seeds of the Chinese yew, Taxus chinensis var mairei.

Three new taxoids were isolated from the seeds of the Chinese yew, Taxus chinesis var mairei, their structures were established as 9alpha, 13alpha-diacetoxy-5alpha-cinnamoyloxy-11(15-->1)-abeo-taxa-4(20),11-diene-10beta, 15-diol, 2alpha,9alpha,10beta-triacetoxy-taxa-4(20),11-diene-5alpha,13alpha-diol and 2alpha,7beta,10beta-triacetoxy-5alpha-cinnamyloxy-9alpha-hydroxy-taxa-4(20),11-diene-13-one on the basis of 1D, 2D NMR, and MS spectral analyses.