title: Taxane diterpenoids from seeds of Taxus mairei.
abstract: A new 2(3-->20) abeotaxane, taxumairone A (1), and a new cis-p-coumaroyl myo-inositol have been isolated from the seeds of Taxus mairei in addition to taxin B (2), taxinine A, taxuspine X, decinnamoyltaxinine E, 5alpha-cinnamoyloxy-9alpha,10beta,13alpha- triacetoxy-taxa-4(20)11-diene and 5alpha-cinnamoyloxy-2alpha,9alpha,10beta,+ ++13alpha-tetraacetoxy-taxa-4(20)11-diene. The structure of 1 was determined by 2D-NMR spectral analysis and chemical correlation with taxin B (2). Compound 1 exhibited potent cytotoxicity against human colon carcinoma cells with an ED50 of 0.1 microg/ml.
authors.affiliation: Institute of Marine Resources, National Sun Yat-sen University, Kaohsiung, Taiwan, Republic of China. ycshen@mail.nsysu.edu.tw
authors.forename: Y C
authors.initials: YC
authors.lastname: Shen
authors.forename: C Y
authors.initials: CY
authors.lastname: Chen
authors.forename: M C
authors.initials: MC
authors.lastname: Hung
mesh_terms: D001952:Bridged-Ring Compounds / Q000737:chemistry* / Q000302:isolation & purification; D004224:Diterpenes / Q000737:chemistry* / Q000302:isolation & purification; D009682:Magnetic Resonance Spectroscopy; D010084:Oxidation-Reduction; D010936:Plant Extracts / Q000737:chemistry; D010946:Plants, Medicinal / Q000737:chemistry*; D012639:Seeds / Q000737:chemistry; D016339:Spectrometry, Mass, Fast Atom Bombardment; D013055:Spectrophotometry, Infrared; D013056:Spectrophotometry, Ultraviolet; D043823:Taxoids / Q000737:chemistry* / Q000302:isolation & purification; D020946:Taxus / Q000737:chemistry*
chemical_list: D001952:Bridged-Ring Compounds; D004224:Diterpenes; D010936:Plant Extracts; D043823:Taxoids; C516683:taxinine A; C080625:taxane