title: New taxane diterpenoid from seed of the Chinese yew, Taxus yunnanensis.
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.
authors.affiliation: Division of Life Science, Graduate School of Agricultural Sciences, Tohoku University, Sendai, Japan.
authors.forename: Q
authors.initials: Q
authors.lastname: Shi
authors.forename: T
authors.initials: T
authors.lastname: Oritani
authors.forename: D
authors.initials: D
authors.lastname: Zhao
mesh_terms: D001952:Bridged-Ring Compounds / Q000737:chemistry*; D004224:Diterpenes / Q000737:chemistry*; D015394:Molecular Structure; D010946:Plants, Medicinal; D012639:Seeds; D013237:Stereoisomerism; D043823:Taxoids; D020946:Taxus / Q000737:chemistry*
chemical_list: D001952:Bridged-Ring Compounds; D004224:Diterpenes; D043823:Taxoids; C080625:taxane