Two new megastigmane O-glucopyranosides from the leaves of Broussonetia papyrifera

Two new megastigmane O-glucopyranosides, named (2R,3R,5R,6S,9R)-3-hydroxy-5,6-epoxy-p-ionol-2-O-beta-D-glucopyranoside (1) and (2R,3R,5R,6S,9R)-3-hydroxyl-5,6-epoxy-acety-beta-ionol-2-O-beta-D-glucopyranoside (2) together with six known mega-stigmanes, were isolated from the leaves of Broussonetia papyrifera (Linn.) Vent. Their structures were established by chemical methods and spectroscopic techniques including 2D NMR. (c) 2007 Wei Sheng Feng. Published by Elsevier B.V. on behalf of Chinese Chemical Society. All rights reserved.