Triterpene glycosides from the roots of Astragalus flavescens
Articles > Article · 2007
Authors: Sibel AVUNDUK, Anne-Claire MITAINE-OFFER, Özgen ALANKUŞ, Tomofumi Miyamoto, Serdar Gökhan ŞENOL, Marie-Aleth LACAILLE-DUBOIS
JOURNAL OF NATURAL PRODUCTS, Journal Indexed in SCI Expanded, International, 2007, vol 71, pp 141-145
DOI: 10.1021/np0703500
Summary
Six new triterpene saponins, 3-O-alpha-L-rhamnopyranosyl-(1 -> 2)-beta-D-Xylopyranosyl-(1 -> 2)-beta-D-glucuronopyranosyl-21-epi-kudzusapogenol A (1), 3-O-alpha-L-rhamnopyranosyl-(1 -> 2)-beta-D-glucopyranosyl-(1 -> 2)-beta-D-glucuronopyranosyl-21-epi-kudzusapogenol A (2), 3-O-alpha-L-rhamnopyranosyl-(1 -> 2)-beta-D-Xylopyranosyl-(1 -> 2)-beta-D-glueuronopyranosyl-22-beta-D-glucopyranosyl-21-epi-kudzusapogenoI A (3), 3-O-alpha-L-rhamnopyranosyl-(1 -> 2)-beta-D-glueopyranosyl-(1 -> 2)-beta-D-glucuronopyranosy1-22-O-alpha-D-glucopyranosyl-21-epi-kudzusapogenol A (4), 3-O-alpha-L-rhamnopyranosyl-(1 -> 2)-beta-D-xylopyranosyl-(1 -> 2)-beta-D-glucuronopyranosyl-22-O-alpha-L-arabinopyranosyl-21-epi-kudzusapogenol A (5), and 3-O-alpha-L-rhamnopyranosyl-(1-2)-beta-D-glucopyranosyl-(1-2)-beta-D-glueuronopyranosyl-22-O-alpha-L-arabinopyranosyl-21-epi-kudzusapogenol A (6), were isolated from the roots of Astragalus flavescens, together with the known trajanoside B, azukisaponin V, and astragalosides IV, VII, and VIII. Their structures were established mainly by 2D NMR techniques and mass spectrometry.