NMR and LC-MSn characterisation of two minor saponins from Ilex paraguariensis.

Détails

ID Serval
serval:BIB_919EB1DC0F95
Type
Article: article d'un périodique ou d'un magazine.
Collection
Publications
Institution
Titre
NMR and LC-MSn characterisation of two minor saponins from Ilex paraguariensis.
Périodique
Phytochemical Analysis
Auteur⸱e⸱s
Martinet A., Ndjoko K., Terreaux C., Marston A., Hostettmann K., Schutz Y.
ISSN
0958-0344 (Print)
ISSN-L
0958-0344
Statut éditorial
Publié
Date de publication
02/2001
Volume
12
Numéro
1
Pages
48-52
Langue
anglais
Notes
Publication types: Journal Article ; Research Support, Non-U.S. Gov't
Publication Status: ppublish
Résumé
Two minor saponins obtained from the methanolic extract of the leaves of Ilex paraguariensis have been characterised by 13C-NMR, 1H-NMR, API-MS and chemical hydrolysis as oleanolic acid-3-O-(beta-D-glucopyranosyl-(1-->3)-alpha-L-arabinopyranosyl)-(28-->1)- beta-D-glucopyranosyl ester (guaiacin B) and oleanolic acid-3-O-(beta-D-glucopyranosyl-(1-->3)-(alpha-L-rhamnopyranosyl- (1-->2))-alpha-L-arabinopyranosyl)-(28-->1)-beta-D-glucopyranosyl ester (nudicaucin C). Both are isomeric forms of the known matesaponins 1 (MSP 1) and 2 (MSP 2) and differ only by the nature of the aglycone: they have oleanolic acid instead of ursolic acid, as found in the matesaponins. These minor saponins have not been fully separated from their major isomers MSP 1 and 2 and were characterised by in-mixture NMR analysis, LC-MS and LC-MSn experiments.
Mots-clé
Base Sequence, Carbon Isotopes, Chromatography, Liquid/methods, Hydrolysis, Ilex paraguariensis/chemistry, Magnetic Resonance Spectroscopy/methods, Molecular Sequence Data, Oleanolic Acid/analogs & derivatives, Saponins/analysis, Saponins/chemistry, Spectrometry, Mass, Electrospray Ionization/methods
Pubmed
Web of science
Création de la notice
21/01/2008 13:07
Dernière modification de la notice
20/08/2019 14:54
Données d'usage