Acylated triterpene saponins from the roots of Securidaca longepedunculata

Four triterpene saponins, 3-O-beta-D-glucopyranosylpresenegenin 28-O-beta-D-apiofuranosyl-(1 -> 3)-beta-D-xylopyranosyl-(1 -> 4)-[beta-D-apiofuranosyl-(1 -> 3)]-alpha-L-rhamnopyranosyl-(1 -> 2)-{4-O-[(E)-3,4,5-trimethoxycinnamoyl]}-beta-D-fucopyranosyl ester, 3-O-beta-D-glucopyranosylpresenegenin 28-O-beta-D-apiofuranosyl-(1 -> 3)-beta-D-xylopyranosyl-(1 -> 4)-[beta-D-apiofuranosyl-(1 -> 3)]-alpha-L-rhamnopyranosyl-(1 -> 2)-[(6-O-acetyl)-beta-D-glucopyranosyl-(1 -> 3)]-{4-O-[(E)-3,4,5-trimethoxycinnamoyl]}-beta-D-fucopyranosyl ester, 3-O-beta-D-glucopyranosylpresenegenin 28-O-beta-D-apiofuranosyl-(1 -> 3)-beta-D-xylopyranosyl-(1 -> 4)-[beta-D-apiofuranosyl-(1 -> 3)]-alpha-L-rhamnopyranosyl-(1 -> 2)-[beta-D-galactopyranosyl-(1 -> 3)]-{4-O-[(E)-3,4,5-trimethoxycinnamoyl]}-beta-D-fucopyranosyl ester, and 3-O-beta-D-glucopyranosylpresenegenin 28-O-beta-D-apiofuranosyl-(1 -> 3)-[alpha-L-arabinopyranosyl-(1 -> 4)]-beta-D-xylopyranosyl-(1 -> 4)-[beta-D-apiofuranosyl-(1 -> 3)]-alpha-L-rhamnopyranosyl-(1 -> 2)-{4-O-[(E)-3,4,5-trimethoxycinnamoyl]}-beta-D-fucopyranosyl ester, were isolated from the roots of Securidaca longepedunculata, together with three known compounds. Their structures were established mainly by 2D NMR techniques and mass spectrometry. (C) 2009 Elsevier Ltd. All rights reserved.