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Daphtenidines A-D, new Daphniphyllum alkaloids from Daphniphyllum teijsmannii |
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| Authors: | Takaaki Kubota Hiroshi Morita Mitsuhiro Sekiguchi |
| Affiliation: | a Graduate School of Pharmaceutical Sciences, Hokkaido University, Sapporo 060-0812, Japan b Faculty of Pharmaceutical Sciences, Hoshi University, Shinagawa-ku, Tokyo 142-8501, Japan c Faculty of Agriculture, University of the Ryukyus, Okinawa 905-142, Japan d Astellas Pharm, Inc., Tsukuba 350-8585, Japan |
| Abstract: | Daphtenidines A-D (1-4), four new alkaloids were isolated from the leaves of Daphniphyllum teijsmannii, and the structures including relative stereochemistry were elucidated on the basis of spectroscopic data. Daphtenidines A (1) and B (2) were possessing daphnilactone A-type skeleton. This is the second isolation of daphnilactone A-type alkaloids from natural sources. Daphtenidine C (3) was 4-acetoxy form of daphmanidin A, while daphtenidine D (4) was 14-dehydro form of yuzurimine. |
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