Quassinoids from Eurycoma longifolia |
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| Authors: | Ang Hooi Hoon Hitotsuyanagi Yukio Fukaya Haruhiko Takeya Koichi |
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| Institution: | School of Pharmacy, Tokyo University of Pharmacy and Life Science, 1432-1 Horinouchi, Hachioji, 192-0392, Tokyo, Japan. |
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| Abstract: | Three quassinoids, eurycolactone D (1), eurycolactone E (2) and eurycolactone F (3) were isolated from the roots of Eurycoma longifolia Jack. The structures of 1-3 were elucidated by spectroscopic methods, and that of 3 was further confirmed by X-ray crystallography. The known quassinoids, laurycolactone B (4) and eurycomalactone (5) were also identified. |
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| Keywords: | Eurycoma longifolia Jack Simaroubaceace Bitter principles Spectroscopy X-ray crystallography Quassinoids Eurycolactone D Eurycolactone E Eurycolactone F |
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