title: Tasumatrols U-Z, taxane diterpene esters from Taxus sumatrana.
abstract: Phytochemical investigation of the leaves and twigs of Taxus sumatrana afforded six new taxane diterpene esters, tasumatrols U-Z ( 1- 6). Compounds 2 and 5 contained a rare five-membered lactone ring at C-8, C-9, C-10, and C-19. The structures were established on the basis of detailed spectroscopic analyses, particularly HRESIMS and 2D NMR techniques. Compound 5 showed cytotoxicity against a human hepatoma (Hep2) cell line.
authors.affiliation: School of Pharmacy, College of Medicine, National Taiwan University, Jen-Ai Rd. Sec. 1, Taipei 100, Taiwan. ycshen@ntu.edu.tw
authors.forename: Ya-Ching
authors.initials: YC
authors.lastname: Shen
authors.forename: Shih-Sheng
authors.initials: SS
authors.lastname: Wang
authors.forename: Ching-Te
authors.initials: CT
authors.lastname: Chien
authors.forename: Yao-Haur
authors.initials: YH
authors.lastname: Kuo
authors.forename: Ashraf Taha
authors.initials: AT
authors.lastname: Khalil
mesh_terms: D000972:Antineoplastic Agents, Phytogenic / Q000737:chemistry / Q000302:isolation & purification* / Q000494:pharmacology; D001952:Bridged-Ring Compounds / Q000737:chemistry / Q000302:isolation & purification* / Q000494:pharmacology; D004224:Diterpenes / Q000737:chemistry / Q000302:isolation & purification* / Q000494:pharmacology; D004354:Drug Screening Assays, Antitumor; D004952:Esters; D006801:Humans; D015394:Molecular Structure; D019906:Nuclear Magnetic Resonance, Biomolecular; D010946:Plants, Medicinal / Q000737:chemistry*; D013624:Taiwan; D043823:Taxoids / Q000737:chemistry / Q000302:isolation & purification* / Q000494:pharmacology; D020946:Taxus / Q000737:chemistry*
chemical_list: D000972:Antineoplastic Agents, Phytogenic; D001952:Bridged-Ring Compounds; D004224:Diterpenes; D004952:Esters; D043823:Taxoids; C080625:taxane