Two new saponins, β‐D‐glucopyranosyl 3‐O[O‐βD‐xylopyranosyl‐(1→3)‐O‐(β‐D‐glucopyranosyluronic acid)]oleanolate (1) and 3‐O‐[O‐β‐D‐xylopyranosyl‐(1→3)‐O‐(β‐D‐glucopyranosyluronic acid)]oleanolic acid (2), have been isolated from the tubers of Talinum tenuissimum. The structures have been established mainly by 13C‐NMR and FAB‐MS. The monodesmosidic saponin 2 exhibits very strong molluscicidal activity against the schistosomiasis‐transmitting snail Biomphalaria glabrata.
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Gafner et al. (1985) studied this question.
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