New taxane diterpenoids from Taiwanese Taxus sumatrana |
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| Authors: | Shen Ya-Ching Pan Yu-Ling Lo Kuang-Liang Wang Shih-Sheng Chang Yao-To Wang Li-Tang Lin Yu-Chi |
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| Institution: | Institute of Marine Resources, National Sun Yat-sen University, Kaohsiung, Taiwan, Republic of China. ycshen@mail.nsysu.edu.tw |
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| 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. |
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