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Three new oleanene glycosides, sophoraflavosides II-IV (2-4) were isolated together with sophoraflavoside I (1) as the corresponding methyl ester forms from Sophorae Radix, the fresh roots of Sophora flavescens AITON (Leguminosae). Their structures have been elucidated as oxytrogenin 3-O-alpha-L-rhamnopyranosyl-(1--&gt;2)-beta-D-galactopyranosyl-(1--&gt;2)-beta -D- glucuronopyranoside (2), 3-O-alpha-L-rhamnopyranosyl-(1--&gt;2)-beta-D-galactopyranosyl-(1--&gt;2)-beta -D-glucuronopyranosyl oxytrogenin 22-O-alpha-L-arabinopyranoside (3) and 3-O-alpha-L-rhamnopyranosyl-(1--&gt;2)-beta-D-galactopyranosyl-(1--&gt;2)-beta -D-glucuronopyranosyl oxytrogenin 22-O-beta-D-glucopyranosyl-(1--&gt;2)-alpha-L-arabinopyranoside (4), along with unambiguous characterization as 3 beta,22 beta,24-trihydroxyolean-12-en-29-oic acid for their sapogenol, named oxytrogenin (5) on the bases of chemical reactions and spectral analyses.

Studies on the constituents of leguminous plants. Part XXXIII. Three New Oleanene Glycosides from Sophora flavescens.