title: [Chemical constituents of bark of Taxus chinensis var. mairei].
abstract: OBJECTIVE
  To study the chemical constituents in the bark of Taxus chinensis var. mairei collected from southeast of China.
  
  
  METHODS
  Chemical constituents were isolated and purified by column chromatography, Prep-TLC, and preparative HPLC. The structures were identified on the basis of 1D-and 2D-NMR spectral analysis.
  
  
  RESULTS
  Twelve taxane diterpenoids were isolated from the bark of Taxus chinensis var. mairei grown in southeast of China. They were identified as: taxagifine (1), decinnamoyltaxagifine (2), 19-debenzoyl-19-acetyltaxinine M(3), 9-dihydro-13-acetyl-baccatin III (4), 7, 9-dideacetylbaccatin IV (5), 1,3-dihydro-taxinine (6), taxumairol C (7), taxezopidine J (8), 7-xylosyl-10-deacetyl-taxol A (9),10-deacetyltaxol (10), taxicin II (11), and 2alpha, 7beta, 10beta-triacetoxy-5alpha, 13alpha-dihydroxy-2 (3 --> 20) abeotaxa-4 (20), 11-dien-9-one (12).
  
  
  CONCLUSIONS
  Compounds 1, 2, 4 - 6, 8, 9, 11 and 12 are obtained from this plant for the first time. Compound 7 is obtained from the bark of Taxus chinensis var. mairei for the first time.
authors.forename: Jian
authors.initials: J
authors.lastname: Su
authors.forename: Hong-Xing
authors.initials: HX
authors.lastname: Shi
authors.forename: Li-Jun
authors.initials: LJ
authors.lastname: Wang
authors.forename: Rui-Xia
authors.initials: RX
authors.lastname: Guo
authors.forename: Tian-Kun
authors.initials: TK
authors.lastname: Ren
authors.forename: Yi-Bing
authors.initials: YB
authors.lastname: Wu
mesh_terms: D002681:China; D002851:Chromatography, High Pressure Liquid; D004224:Diterpenes / Q000737:chemistry* / Q000302:isolation & purification; D009682:Magnetic Resonance Spectroscopy; D015394:Molecular Structure; D024301:Plant Bark / Q000737:chemistry*; D010946:Plants, Medicinal / Q000737:chemistry*; D043823:Taxoids / Q000737:chemistry / Q000302:isolation & purification; D020946:Taxus / Q000737:chemistry*
chemical_list: C400581:9-dihydrobaccatin III; D004224:Diterpenes; D043823:Taxoids; C031494:10-deacetyltaxol