title: New taxane diterpenoids from Taiwanese Taxus sumatrana.
abstract: Two new taxane diterpenoids, tasumatrols A (1) and B (2), have been isolated from extracts of the leaves and twigs of Taiwanese Taxus sumatrana. Tasumatrol A is a rare 5/6/6 taxene system, having a novel gamma-lactone at C-10 and C-19. The structures of compounds 1 and 2 were determined on the basis of two dimensional (2D)-NMR techniques, including correlation spectroscopy (COSY), 1H-detected heteronuclear multiple quantum coherence (HMQC) and heteronuclear multiple bond connectivity (HMBC) experiments.
authors.affiliation: Institute of Marine Resources, National Sun Yat-sen University, Kaohsiung, Taiwan, Republic of China. ycshen@mail.nsysu.edu.tw
authors.forename: Ya-Ching
authors.initials: YC
authors.lastname: Shen
authors.forename: Yu-Ling
authors.initials: YL
authors.lastname: Pan
authors.forename: Kuang-Liang
authors.initials: KL
authors.lastname: Lo
authors.forename: Shih-Sheng
authors.initials: SS
authors.lastname: Wang
authors.forename: Yao-To
authors.initials: YT
authors.lastname: Chang
authors.forename: Li-Tang
authors.initials: LT
authors.lastname: Wang
authors.forename: Yu-Chi
authors.initials: YC
authors.lastname: Lin
mesh_terms: D001952:Bridged-Ring Compounds / Q000737:chemistry / Q000302:isolation & purification*; D004224:Diterpenes / Q000737:chemistry / Q000302:isolation & purification*; D010936:Plant Extracts / Q000737:chemistry / Q000302:isolation & purification; D018515:Plant Leaves; D018547:Plant Stems; D013624:Taiwan; D043823:Taxoids / Q000737:chemistry / Q000302:isolation & purification*; D020946:Taxus
chemical_list: D001952:Bridged-Ring Compounds; D004224:Diterpenes; D010936:Plant Extracts; D043823:Taxoids; C080625:taxane