Tasumatrols U-Z, taxane diterpene esters from Taxus sumatrana |
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Authors: | Shen Ya-Ching Wang Shih-Sheng Chien Ching-Te Kuo Yao-Haur Khalil Ashraf Taha |
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Institution: | School of Pharmacy, College of Medicine, National Taiwan University, Jen-Ai Rd. Sec. 1, Taipei 100, Taiwan. ycshen@ntu.edu.tw |
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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. |
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