Search results for "Cucurbita foetidissima"

showing 3 items of 3 documents

A New Major Triterpene Saponin from the Roots of Cucurbita foetidissima

2000

Foetidissimoside B (1), a novel triterpene saponin, was isolated from the roots of Cucurbita foetidissima. Based on spectroscopic data, especially direct and long-range heteronuclear 2D NMR analysis and on chemical transformations, the structure of 1 was elucidated as 3-O-beta-D-glucuronopyranosyl-echinocystic acid 28-O-beta-D-glucopyranosyl-(1-->3)-beta-D-xylopyranosyl(1-->3)-[beta- D-xylopyranosyl (1-->4)]-alpha-L-rhamnopyranosyl-(1-->2)-alpha-L-arabinopyranoside . Compound 1 did not show any ability to potentiate in vitro cisplatin cytotoxicity in a human colon cancer cell line.

StereochemistryMolecular Sequence DataSaponinPharmaceutical ScienceUronic acidPharmacognosyPlant RootsAnalytical Chemistrychemistry.chemical_compoundTriterpeneDrug DiscoveryCarbohydrate ConformationTumor Cells CulturedHumansOleanolic AcidCytotoxicityPharmacologychemistry.chemical_classificationbiologySpectrum AnalysisOrganic ChemistryGlycosideSaponinsbiology.organism_classificationCucurbitaceaeCarbohydrate SequenceComplementary and alternative medicineHeteronuclear moleculechemistryBiochemistryMolecular MedicineCucurbita foetidissimaDrug Screening Assays AntitumorJournal of Natural Products
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Foetidissimosides C–F, Novel Glycosides from the Roots ofCucurbita foetidissima

2004

Two novel echinocystic acid (=(3β,16α)-3,16-dihydroxyolean-12-en-28-oic acid) glycosides, foetidissimosides C (1), and D (2), along with new cucurbitane glycosides, i.e., foetidissimosides E/F (3/4) as an 1 : 1 mixture of the (24R)/(24S) epimers, were obtained from the roots of Cucurbita foetidissima. Their structures were elucidated by means of a combination of homo- and heteronuclear 2D-NMR techniques (COSY, TOCSY, NOESY, ROESY, HSQC, and HMBC), and by FAB-MS. The new compounds were characterized as (3β,16α)-28-{[O-β-D-glucopyranosyl-(13)-O-β-D-xylopyranosyl-(14)-O-6-deoxy-α-L-mannopyranosyl-(12)-α-L-arabinopyranosyl]oxy}-16-hydroxy-28-oxoolean -12-en-3-yl β-D-glucopyranosiduronic acid (1…

chemistry.chemical_classificationbiologyChemistryStereochemistryOrganic ChemistryGlycosideCucurbitanebiology.organism_classificationBiochemistryCatalysisInorganic Chemistrychemistry.chemical_compoundHeteronuclear moleculeDrug DiscoveryEpimerCucurbita foetidissimaPhysical and Theoretical ChemistryEchinocystic acidTwo-dimensional nuclear magnetic resonance spectroscopyHeteronuclear single quantum coherence spectroscopyHelvetica Chimica Acta
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Foetidissimosides C—F, Novel Glycosides from the Roots of Cucurbita foetidissima.

2004

Two novel echinocystic acid (=(3β,16α)-3,16-dihydroxyolean-12-en-28-oic acid) glycosides, foetidissimosides C (1), and D (2), along with new cucurbitane glycosides, i.e., foetidissimosides E/F (3/4) as an 1 : 1 mixture of the (24R)/(24S) epimers, were obtained from the roots of Cucurbita foetidissima. Their structures were elucidated by means of a combination of homo- and heteronuclear 2D-NMR techniques (COSY, TOCSY, NOESY, ROESY, HSQC, and HMBC), and by FAB-MS. The new compounds were characterized as (3β,16α)-28-{[O-β-D-glucopyranosyl-(13)-O-β-D-xylopyranosyl-(14)-O-6-deoxy-α-L-mannopyranosyl-(12)-α-L-arabinopyranosyl]oxy}-16-hydroxy-28-oxoolean -12-en-3-yl β-D-glucopyranosiduronic acid (1…

chemistry.chemical_classificationbiologyStereochemistryGlycosideGeneral Medicinebiology.organism_classificationCucurbitanechemistry.chemical_compoundchemistryHeteronuclear moleculeCucurbita foetidissimaEpimerEchinocystic acidTwo-dimensional nuclear magnetic resonance spectroscopyHeteronuclear single quantum coherence spectroscopyChemInform
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