A New Isoflavone and the Corresponding Isoflavanone of Licorice Root

Abstract

As the constituents of Sinkiang licorice root (Glycyrrhiza spp., Leguminosae), two new isoflavonoid compounds, licoisoflavone B (V) and licoisoflavanone (XII), were isolated as acetates and their structures were determined by chemical and spectroscopic studies. Besides them, isoliquiritigenin, formononetin, 7,4’-dihydroxyflavone, echinatin (III) and glabrol (IV) were also isolated. © 1978, The Pharmaceutical Society of Japan. All rights reserved.