Triterpenoid saponins from Cylicodiscus gabunensis
| Autor: | Mathieu Tene, Philippe Chabert, Olivier Noté, Timothee Julbelin Nwemeguela Kenla, Pierre Tane, Annelise Lobstein |
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| Rok vydání: | 2011 |
| Předmět: |
chemistry.chemical_classification
Stereochemistry Saponin Plant Science DEPT Carbon-13 NMR Biochemistry chemistry Triterpene Trisaccharide Agronomy and Crop Science Two-dimensional nuclear magnetic resonance spectroscopy Heteronuclear single quantum coherence spectroscopy Biotechnology Triterpenoid saponin |
| Zdroj: | Phytochemistry Letters. 4:89-92 |
| ISSN: | 1874-3900 |
| Popis: | Gabunoside ( 1 ), a new oleanane-type triterpene saponin determined as 3- O -[ β - l -arabinopyranosyl-(1 → 2)- α - l -arabinopyranosyl-(1 → 3)- β - d -glucopyranosyl] maslinic acid-28-α- l -rhamnopyranosyl ester, together with the known cylicodiscoside ( 2 ), and 3- O -[ α - l -arabinopyranosyl-(1 → 3)- β - d -glucopyranosyl] cylicodiscic acid ( 3 ) were isolated from the stem bark of Cylicodiscus gabunensis . After previous isolation of cyclodione from a Cameroonian plant, new investigations are performed on the more polar fractions of this species. Their structures were established by direct interpretation of their spectral data, mainly HRESIMS, 1D NMR ( 1 H, 13 C NMR, DEPT) and 2D NMR (COSY, NOESY, HSQC and HMBC), and by comparison with the literature. The structure of the trisaccharide moiety of cylicodiscoside has been revised. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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