Search results for "Xyloside"

showing 2 items of 2 documents

Junceosides A-C, new triterpene saponins from Arenaria juncea.

2002

Three novel triterpenoid saponins, junceosides A (1), B (2), and C (3), together with two known saponins have been isolated from the roots of Arenaria juncea. Their structures were elucidated using a combination of homo- and heteronuclear 2D NMR techniques (COSY, TOCSY, NOESY, HSQC, and HMBC) and by FABMS. The new compounds were characterized as 3-O-alpha-L-arabinopyranosyl-(1-->2)-[beta-D-galactopyranosyl-(1-->3)]-beta-D-glucuronopyranosylgypsogenin-28-O-beta-D-glucopyranosyl(1-->3)-[beta-D-xylopyranosyl-(1-->4)]-alpha-L-rhamnopyranosyl-(1-->2)-beta-D-fucopyranoside (1), 3-O-alpha-L-arabinopyranosyl-(1-->2)-[beta-D-galactopyranosyl-(1-->3)]-beta-D-glucuronopyranosylgypsogenin-28-O-beta-D-x…

Chemical PhenomenaSpectrophotometry InfraredStereochemistrySaponinPharmaceutical ScienceCaryophyllaceaeUronic acidPlant RootsAnalytical Chemistrychemistry.chemical_compoundTriterpeneDrug DiscoveryTetrasaccharideTrisaccharideOleanolic AcidPharmacologychemistry.chemical_classificationPlants MedicinalMolecular StructureChemistry PhysicalHydrolysisOrganic ChemistrySaponinsTriterpenesXylosideComplementary and alternative medicinechemistryHeteronuclear moleculeMolecular MedicineChromatography Thin LayerTwo-dimensional nuclear magnetic resonance spectroscopyDrugs Chinese HerbalJournal of natural products
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Triterpene Saponins from Tupidanthus calyptratus

2001

Five new bisdesmosidic saponins (1--5) were isolated from the aerial parts of Tupidanthus calyptratus. Their structures were determined by (1)H--(1)H correlation spectroscopy (COSY, TOCSY, ROESY) and (1)H--(13)C correlation (HSQC, HMBC) NMR experiments, FABMS, and chemical data.

Magnetic Resonance SpectroscopyStereochemistrySaponinOligosaccharidesPharmaceutical ScienceSpectrometry Mass Fast Atom BombardmentPharmacognosyAnalytical ChemistryTriterpeneDrug DiscoveryHumansPharmacologychemistry.chemical_classificationPlants MedicinalChemistryOrganic ChemistryGlycosideSaponinsAntineoplastic Agents PhytogenicTriterpenesTerpenoidXylosideItalyComplementary and alternative medicineTriterpene SaponinsArialiaceae plantsMolecular MedicineDrug Screening Assays AntitumorTwo-dimensional nuclear magnetic resonance spectroscopyHeteronuclear single quantum coherence spectroscopy
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