1. Saponins from Pisonia umbellifera
- Author
-
Louisette Le Men-Olivier, Catherine Lavaud, Georges Massiot, Geneviève Bourdy, and Stanislas Beauvière
- Subjects
Magnetic Resonance Spectroscopy ,Stereochemistry ,Chemical structure ,Saponin ,Plant Science ,PLANTE ,Horticulture ,Spectrometry, Mass, Fast Atom Bombardment ,Biochemistry ,COMPOSITION CHIMIQUE ,Trees ,chemistry.chemical_compound ,Triterpenoid ,Triterpene ,Carbohydrate Conformation ,Moiety ,Molecular Biology ,Oleanolic acid ,chemistry.chemical_classification ,METHODE D'ANALYSE ,SAPONINE ,IDENTIFICATION ,biology ,Chemistry ,General Medicine ,Carbon-13 NMR ,Saponins ,biology.organism_classification ,RMN ,STRUCTURE CHIMIQUE ,ISOLEMENT ,SPECTROMETRIE DE MASSE ,FEUILLE ,Pisonia umbellifera - Abstract
Six saponins were isolated from the leaves of Pisonia umbellifera. Three are new oleanolic acid saponins, and two of them contain an unusual seco-glycopyranosyl moiety. Their structures were determined using a combination of 1H and 13C NMR, and mass spectrometry as 3-O-{β- d -glucopyranosyl (1 → 2)[β- d -glucopyranosyl (1 → 2)-β- d -xylopyranosyl (1 → 3)]-β- d - glucoronopyranosyl 28-O-β- d -glucopyranosyl olean-12-en-3β-ol-28-oic acid, 3-O-{2′-(2″-O- glycolyl)-glyoxylyl -β- d -glucuronopyranosyl } 28-O-β- d -glucopyranosyl olean-12-en-3β-ol- 28-oic acid and 3-O-{2′-O- glycolyl)-glyoxylyl -β- d -glucuronopyranosyl } olean-12-en-3β-ol-28-oic acid.
- Published
- 1996