Woodfordin D and oenothein A, trimeric hydrolyzable tannins of macro-ring structure with antitumor activity |
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| Authors: | T Yoshida T Chou M Matsuda T Yasuhara K Yazaki T Hatano A Nitta T Okuda |
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| Institution: | Faculty of Pharmaceutical Sciences, Okayama University, Japan. |
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| Abstract: | Two new antitumor trimeric hydrolyzable tannins, woodfordin D (5) and oenothein A (13), were isolated from the dried flowers of Woodfordia fruticosa, and their macrocyclic structures, which have a novel constituent unit (woodfordinoyl group) connecting the monomers, have been elucidated on the basis of spectral and chemical evidence. Oenothein A (13) was also isolated from the leaves of Oenothera biennis. |
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