Saponins and acylated saponins from Dizygotheca kerchoveana

descriptionPublicationkeyboard_double_arrow_right Article 01 Dec 2004 English Publisher:Elsevier BVJournal:Phytochemistry, volume 65, pages 3,089-3,095 (issn: 0031-9422,

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Authors: F R, Melek; Toshio, Miyase; S M, Abdel-Khalik; I I, Mahmoud; S A, Mina;

doi: 10.1016/j.phytochem.2004.08.049

pmid: 15541736

Saponins and acylated saponins from Dizygotheca kerchoveana

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Abstract

Four new triterpenoid saponins were isolated from the leaves and stem of branches of Dizygotheca kerchoveana along with seven known ones. The new saponins were respectively characterized as 3-O-[beta-D-glucopyranosyl-(1-->3)]-[beta-D-glucopyranosyl-(1-->2)]-alpha-L-arabinopyranosyl echinocystic acid, 3-O-[beta-D-glucopyranosyl-(1-->3)]-[beta-D-glucopyranosyl-(1-->2)]-alpha-L-arabinopyranosyl echinocystic acid 28-O-[alpha-L-rhamnopyranosyl-(1-->4)-beta-D-glucopyranosyl-(1-->6)-beta-D-glucopyranosyl] ester, 3-O-[beta-D-3-O-trans-p-coumaroyl-glucopyranosyl-(1-->3)]-[beta-D-glucopyranosyl-(1-->2)]-alpha-L-arabinopyranosyl echinocystic acid 28-O-[alpha-L-rhamnopyranosyl-(1-->4)-beta-D-glucopyranosyl-(1-->6)-beta-D-glucopyranosyl] ester and 3-O-[beta-d-3-O-cis-p-coumaroyl-glucopyranosyl-(1-->3)]-[beta-D-glucopyranosyl-(1-->2)]-alpha-L-arabinopyranosyl echinocystic acid 28-O-[alpha-L-rhamnopyranosyl-(1-->4)-beta-D-glucopyranosyl-(1-->6)-beta-D-glucopyranosyl] ester. Their structures were elucidated by 1D and 2D NMR experiments, FAB-MS as well as chemical means.

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Keywords

Plant Leaves, Magnetic Resonance Spectroscopy, Molecular Structure, Plant Stems, Hydrolysis, Saponins, Araliaceae

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