Excoecarins D, E, and K, from excoecaria agallocha |
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| Authors: | Konishi T Konoshima T Fujiwara Y Kiyosawa S |
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| Institution: | Kyoto Pharmaceutical University, 5 Nakauchi-cho, Misasagi, Yamashina-ku, Kyoto 607-8414, Japan. konishi@mb.kyoto-phu.ac.jp |
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| Abstract: | Three novel diterpenoids, excoecarins D, E, and K (1-3), were isolated from Excoecaria agallocha. The structures of 1-3 were established as 3alpha,18-dihydroxy-3beta,20-epoxybeyer-15-ene, (15R, 16S)-ent-15,16-epoxybeyeran-3-one, and ent-3beta-hydroxykaur-16-en-2-one, respectively, on the basis of extensive NMR experiments and, in the case of 1, by X-ray analysis. |
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