title: Structural determination of a new 2(3 --> 20)abeotaxane with an unusual 13beta-substitution pattern and a new 6/8/6-ring taxane from Taxus cuspidata.
abstract: A new 2(3 --> 20)abeotaxane with an unusual 13beta-substitution pattern and a new 6/8/6-ring taxane were isolated from the methanol extract of the needles of Taxus cuspidata. The structures were established as 2alpha,7beta-diacetoxy-5alpha,10beta,13beta-trihydroxy-2(3 --> 20)abeotaxa-4(20), 11-dien-9-one (1) and 2alpha,5alpha,7beta,9alpha,13alpha-pentahydroxy-10beta-acetoxytaxa-4(20),11-diene (2) on the basis of 1D and 2D NMR spectral data and high-resolution FAB-MS analyses.
authors: Department of Medicinal Natural Product Chemistry, School of Pharmaceutical Sciences, Hebei Medical University, 361 Zhongshan East Road, 050017, Shijiazhuang, Hebei Province, P. R. China.
authors: Changhong
authors: C
authors: Huo
authors: Xiaohui
authors: X
authors: Su
authors: Xing
authors: X
authors: Li
authors: Xiping
authors: X
authors: Zhang
authors: Cunfang
authors: C
authors: Li
authors: Yufang
authors: Y
authors: Wang
authors: Qingwen
authors: Q
authors: Shi
authors: Hiromasa
authors: H
authors: Kiyota
mesh_terms: D009682:Magnetic Resonance Spectroscopy; D015394:Molecular Structure; D018515:Plant Leaves / Q000737:chemistry*; D043823:Taxoids / Q000737:chemistry / Q000302:isolation & purification*; D020946:Taxus / Q000737:chemistry* / Q000145:classification
chemical_list: C522117:2alpha,5alpha,7beta,9alpha,13alpha-pentahydroxy-10beta-acetoxytaxa-4(20),11-diene; C522116:2alpha,7beta-diacetoxy-5alpha,10beta,13beta-trihydroxy-2(3-20)abeotaxa-4(20),11-dien-9-one; D043823:Taxoids