A new protopanaxadiol-type ginsenoside, 6-O-β-d-glucopyranosyl-20-O-β-d-glucopyranosyl-20(S)-protopanaxadiol-3-one (1), along with three known compounds, was isolated from the roots of Panax notoginseng. Their structures were determined based on some pieces of spectroscopic and chemical evidence. Compound 1 exhibited cytotoxic activity against five human cancer cell lines, with IC50 values ranging from 5.4 to 8.6 μg/ml.
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Fu et al. (2013) studied this question.
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