Furostanol saponins and quercetin glycosides from the leaves of Helleborus viridis L.
作者： Alessandra Braca , Josè Maria Prieto , Nunziatina De Tommasi , Franca Tomè , Ivano Morelli
DOI: 10.1016/J.PHYTOCHEM.2004.07.013
关键词:
摘要: Phytochemical analysis of the polar extracts leaves Helleborus viridis (Ranunculaceae) resulted in isolation two new furostanol saponins (25R)-26-[(alpha-L-rhamnopyranosyl)oxy]-22alpha-methoxyfurost-5-en-3beta-yl O-beta-D-glucopyranosyl-(1-->3)-O-[6-acetyl-beta-D-glucopyranosyl-(1-->3)]-O-beta-D-glucopyranoside (1) and O-beta-D-glucopyranosyl-(1-->3)-O-beta-D-glucopyranosyl-(1-->3)-O-beta-D-glucopyranoside (2) three quercetin glycosides, 3-O-(2-E-caffeoyl)-alpha-L-arabinopyranosyl-(1-->2)-beta-D-galactopyranoside-7-O-beta-d-glucopyranoside (3), 3-O-(2-E-caffeoyl)-alpha-L-arabinopyranosyl-(1-->2)-beta-D-galactopyranoside (4), 3-O-alpha-L-arabinopyranosyl-(1-->2)-beta-D-galactopyranoside (5). The structures compounds were determined by spectroscopic analysis, including 2D NMR data mass spectrometry.
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