Monomeric Indole Alkaloids from Kopsia officinalis. |
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| Authors: | Feng X Z Kan C Potier P Kan S K Lounasmaa M |
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| Affiliation: | Institut de Matière Médicale, Académie Chinoise des Sciences Médicales, Pékin, Chine. |
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| Abstract: | Ten monomeric indole alkaloids have been identified from the roots of KOPSIA OFFICINALIS. Four of them are known: (-)-kopsinine 1, (+)-5,22-dioxokopsane 2, (-)-tetrahydroalstonine 4, and (-)-quebrachamine 3; and six are new: (-)-isoeburnamine 5 (enantiomer of the known alkaloid (+)-isoeburnamine), (-)-N-methoxycarbonyl-12-methoxykopsinaline 7, (-)-N-methoxycarbonyl-11,12-methylenedioxy kopsinaline 8, (-)-N-methoxycarbonyl-11,12-dimethoxykopsinaline 9, (-)-11,12-methylenedioxykopsinaline 10, and (-)-12-methoxykopsinaline 11. |
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