title: A new taxane diterpenoid from Taxus mairei.
abstract: A new 11(15-->1)-abeotaxane diterpene, taxumairol K (1), has been isolated from the ethanolic extract of the roots of Formosan Taxus mairei (Lemee & Levl.) S. Y. Hu. The structure of 1 was determined as 9alpha-(benzoyloxy)-2alpha,4alpha- diacetoxy-5beta ,20-epoxy-1beta, 7beta,10beta,13alpha-tetrahydroxy-11(15-->1)-abeota xane on the basis of spectral analysis. Taxumairol K (1) exhibited mild cytotoxicity against HeLa tumor cells.
authors.affiliation: Institute of Marine Resources, National Sun Yat-sen University, 70 Lien-Hai Road, Kaohsiung, Taiwan, Republic of China.
authors.forename: Y C
authors.initials: YC
authors.lastname: Shen
authors.forename: C Y
authors.initials: CY
authors.lastname: Chen
authors.forename: Y H
authors.initials: YH
authors.lastname: Kuo
mesh_terms: D000972:Antineoplastic Agents, Phytogenic / Q000302:isolation & purification* / Q000494:pharmacology; D002681:China; D004354:Drug Screening Assays, Antitumor; D006801:Humans; D009682:Magnetic Resonance Spectroscopy; D013058:Mass Spectrometry; D017239:Paclitaxel / Q000031:analogs & derivatives* / Q000302:isolation & purification / Q000494:pharmacology; D010946:Plants, Medicinal / Q000737:chemistry*; D013055:Spectrophotometry, Infrared; D013056:Spectrophotometry, Ultraviolet; D043823:Taxoids; D014407:Tumor Cells, Cultured
chemical_list: D000972:Antineoplastic Agents, Phytogenic; D043823:Taxoids; C113234:taxumairol K; D017239:Paclitaxel