Saponin and sapogenol. XLVII. On the constituents of the roots of Glycyrrhiza uralensis Fisher from Northeastern China (1). Licorice-saponins A3, B2, and C2

Article abstract of DOI:10.1248/cpb.41.43

From the air-dried root of Glycyrrhiza uralensis, collected in the northeastern part of China, ten new oleanane-type triterpene oligoglycosides were isolated together with glycyrrhizin (1) and several known flavonoids. Among the newly isolated triterpene oligoglycosides, the chemical structures of licorice-saponin A3 (2), licorice-saponin B2 (3), and licorice-saponin C2 (4) have been determined, on the basis of chemical and physicochemical evidence, to be expressed as 30-O-β-D-glucopyranosylglycyrrhizin, 11-deoxo-glycyrrhizin, and 3-O-[β-D-glucuronopyranosyl(1→2)-β-D-glucuronopyranosyl]oleana-11,1 3(18)-dien-30-oic acid, respectively. During the course of these studies, facile conversions from glycyrrhizin (1) to licorice-saponins A3 (2), B2 (3), and C2 (4) have been accomplished.

Full text of DOI:10.1248/cpb.41.43

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