Oleanane Saponins and Glycerogalactolipids from the Leaves of Guapira graciliflora

Two new saponins, 3‐O‐[β‐D‐xylopyranosyl‐(1→3)‐β‐D‐galactopyranosyl‐(1→3)‐β‐glucuronopyranosyl]oleanolic acid 28‐O‐β‐D‐glucopyranosyl ester (1) and the corresponding monodesmoside, 3‐O‐[β‐D‐xylopyranosyl‐(1→3)‐β‐D‐galactopyranosyl‐(1→3)‐β‐glucuronopyranosyl]oleanolic acid (2), have been isolated fro...

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Veröffentlicht in:	Helvetica chimica acta 2010-06, Vol.93 (6), p.1058-1066
Hauptverfasser:	Severi, Juliana A., Fertig, Orlando, Plitzko, Inken, Vilegas, Wagner, Hamburger, Matthias, Potterat, Olivier
Format:	Artikel
Sprache:	eng
Schlagworte:	Chemotaxonomy Glycerogalactolipids Guapira graciliflora Lipids Oleanane saponins Saponins
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creator	Severi, Juliana A. Fertig, Orlando Plitzko, Inken Vilegas, Wagner Hamburger, Matthias Potterat, Olivier
description	Two new saponins, 3‐O‐[β‐D‐xylopyranosyl‐(1→3)‐β‐D‐galactopyranosyl‐(1→3)‐β‐glucuronopyranosyl]oleanolic acid 28‐O‐β‐D‐glucopyranosyl ester (1) and the corresponding monodesmoside, 3‐O‐[β‐D‐xylopyranosyl‐(1→3)‐β‐D‐galactopyranosyl‐(1→3)‐β‐glucuronopyranosyl]oleanolic acid (2), have been isolated from the leaves of Guapira graciliflora (Nyctaginaceae), together with two further oleanane saponins, 3 and 4, daucosterol (5), and two known glycerogalactolipids, 6 and 7. The structures of the new compounds were established by extensive NMR and MS experiments, in conjunction with acid hydrolysis and sugar analysis. This is the first report on the phytochemistry of plants of the genus Guapira.
doi_str_mv	10.1002/hlca.201000071
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subjects	Chemotaxonomy Glycerogalactolipids Guapira graciliflora Lipids Oleanane saponins Saponins
title	Oleanane Saponins and Glycerogalactolipids from the Leaves of Guapira graciliflora
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