Journal
JOURNAL OF NATURAL PRODUCTS
Volume 71, Issue 1, Pages 141-145Publisher
AMER CHEMICAL SOC
DOI: 10.1021/np0703500
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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.
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