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Two new saponins from Zygophyllum atriplicoides
Viqar Uddin Ahmad1, Shazia Iqbal, Farzana Kousar
1HEJ Research Institute of Chemistry, International Center for Chemical Sciences, University of Karachi; 75270 Karachi, Pakistan. vuahmad@cyber.net.pr
Abstract:
Phytochemicals investigation of the whole plant of Zygophyllum atriplicoides resulted in the isolation of two new triterpenoidal saponins together with a known compound. The structure of the new compounds atriplicosaponin A (1) and atriplicosaponin B (2) were established as 3-O-[alpha-D-glucopyranosyl-(1-->2)-beta-D-xylopyranosyl]-hederagenin and 27 alpha-hydroxyurs-12-ene-3-O-[beta-D-glucopyranosyl(1-->4)(2-O-sulpho)-beta-D-quinovopyranoside] and known compound was identified as 3-O-[beta-D-glucopyranosyl]-beta-sitosterol. The structure elucidations of the compounds were based primarily on 1D and 2D-NMR analysis, including COSY, HMBC and HMQC correlations.
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