LICORICE-SAPONINS F3, G2, H2, J2, AND K2, FIVE NEW OLEANENE-TRITERPENE OLIGOGLYCOSIDES FROM THE ROOT OF GLYCYRRHIZA URALENSIS

Abstract

Following the structure elucidation of licorice-saponins A3, B2, C2, D3, and E2, the structures of five more new oleanene-triterpene oligoglycosides named licorice-saponins F3 (<1>__∼), G2 (<5>__∼), H2 (<7>__∼), J2 ((10)___∼), and K2 ((12)___∼), concomitantly isolated from the root of Glycyrrhiza uralensis Fischer= (Tohoku-kanzo in Japanese), have been determined on the basis of chemical and physicochemical evidence. During the process, a facile chemical conversion method from olean-12-ene or olean-12-en-11-one oligoglycosides to an olean-11, 13-diene oligoglycoside, has been found.