Chemical investigation on the rhizome of Souliea vaginata resulted in the isolation of two new cycloartane triterpene glycosides and a new alkaloid, soulieosides D and E, and soulieotine (1⎯3), and their structures were elucidated on the basis of extensive NMR spectral experiments and chemical methods as (20S * ,22R * ,23S * ,24R * )-16β:23;22:25-diepoxy-3β,24-dihydroxy-23-methoxy-9,19cyclolanostane-3-O-β-D-(4-acetyl)xylopyranoside (1), (20S * ,22R * ,23S * ,24R * )-16β:23;22:25-diepoxy-3β,23,24-trihydroxy-9,19-cyclolanostane-3-O-β-D-(3-acet yl)xylopyranoside (2), E-3-
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Zhou et al. (2005) studied this question.