Characterization of the fraction components using 1D TOCSY and 1D ROESY experiments. Four new spirostane saponins from Agave brittoniana Trel. spp. Brachypus

Copyright (c) 2007 John Wiley & Sons, Ltd.

Bibliographische Detailangaben
Veröffentlicht in:Magnetic resonance in chemistry : MRC. - 1985. - 45(2007), 7 vom: 01. Juli, Seite 615-20
1. Verfasser: Macías, Francisco A (VerfasserIn)
Weitere Verfasser: Guerra, José O, Simonet, Ana M, Nogueiras, Clara M
Format: Aufsatz
Sprache:English
Veröffentlicht: 2007
Zugriff auf das übergeordnete Werk:Magnetic resonance in chemistry : MRC
Schlagworte:Journal Article Research Support, Non-U.S. Gov't Plant Extracts Saponins Spirostans
Beschreibung
Zusammenfassung:Copyright (c) 2007 John Wiley & Sons, Ltd.
A careful NMR analysis, especially 1D TOCSY and 1D ROESY, of two refined saponin fractions allowed us to determine the structures of four new saponins from a polar extract of the Agave brittoniana Trel. spp. Brachypus leaves. A full assignment of the 1H and 13C spectral data for these new saponins, agabrittonosides A-D (1-4), and one previously known saponin, karatavioside A (5) is reported. Their structures were established using a combination of 1D and 2D (1H, 1H-COSY, TOCSY, ROESY, g-HSQC, g-HMBC and g-HSQC-TOCSY) NMR techniques and ESI-MS. Moreover, the work represents a new approach to structural elucidation of saponins in refined fractions by NMR investigations
Beschreibung:Date Completed 19.09.2007
Date Revised 04.06.2007
published: Print
Citation Status MEDLINE
ISSN:1097-458X