0000000000079628

AUTHOR

Maurice Jay

showing 2 related works from this author

A new oleanane glycoside from the roots ofAstragalus caprinus

2006

A novel oleanane-type triterpene saponin (1) together with two known molecules, soyasapogenol B and astragaloside VIII were isolated from the roots of Astragalus caprinus. Their structural elucidation was performed mainly by 2D NMR techniques (COSY, TOCSY, NOESY, HSQC, HMBC) and mass spectrometry. Compound 1 was determined as 3-O-[alpha-L-rhamnopyranosyl-(1 --> 2)-beta-D-glucuronopyranosyl]-22-O-beta-D-apiofuranosyl-soyasapogenol B.

chemistry.chemical_classificationMagnetic Resonance SpectroscopyMolecular StructureChemistryStereochemistrySaponinGlycosideAstragalus PlantGeneral ChemistryNuclear magnetic resonance spectroscopyPlant Rootschemistry.chemical_compoundAstragalosideTriterpeneOrganic chemistryGeneral Materials ScienceGlycosidesOleanolic AcidOleananeTwo-dimensional nuclear magnetic resonance spectroscopyHeteronuclear single quantum coherence spectroscopyMagnetic Resonance in Chemistry
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Two New Glycosides from Astragalus caprinus

2001

A new glycoside of flavonol (1) and a new glycoside of a cycloartane-type triterpene (2) were isolated from the leaves and the roots of Astragalus caprinus, respectively. Their structures were elucidated in turn by spectroscopic data interpretation as 3-O-[[beta-D-xylopyranosyl(1-->3)-alpha-L-rhamnopyranosyl(1-->6)][beta-D-apiofuranosyl(1-->2)]]-beta-D-galactopyranosyl kaempferol (1) and 3-O-(beta-D-xylopyranosyl)-24-O-(beta-D-glucopyranosyl)-20,25-epoxycycloartane-3beta,6alpha,16beta,24alpha-tetrol (2).

Magnetic Resonance SpectroscopyTunisiaSpectrophotometry InfraredStereochemistryFlavonoidSaponinPharmaceutical ScienceSpectrometry Mass Fast Atom BombardmentPharmacognosyPlant RootsAnalytical Chemistrychemistry.chemical_compoundTriterpeneDrug DiscoveryTetrasaccharideGlycosidesKaempferolsFlavonoidsPharmacologychemistry.chemical_classificationPlants MedicinalHydrolysisOrganic ChemistryGlycosideSaponinsTriterpenesTerpenoidPlant LeavesComplementary and alternative medicinechemistryMolecular MedicineSpectrophotometry UltravioletKaempferolJournal of Natural Products
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