Author's Organization：Faculty of Pharmaceutical Sciences, University of Tokyo:(Present address)School of Pharmaceutical Sciences, Showa University Faculty of Pharmaceutical Sciences, University of Tokyo Faculty of Pharmaceutical Sciences, University of Tokyo:(Present address)Meiji College of Pharmacy
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.
