5 FLAVONOID COMPOUNDS FROM ECHINOSOPHORA-KOREENSIS

Further investigation of the phenolic compound in the roots and stems of Echinosophora koreensis led to the isolation of three new isoflavanones from the roots and 14 compounds, including two new flavanones, from the stems. Their structures were determined by means of spectral analysis to be 3,5,7,4'-tetrahydroxy-2'-methoxy-3'-gamma,gamma-dimethylallylisoflavanone (kenusanone F), 5,7,3'-trihydroxy-4'-methoxyisoflavanone (kenusanone G) and 8-geranyl-5,7,2',4'-tetrahydroxyisoflavanone (kenusanone H) as root constituents, and 5,2',4'-trihydroxy-7-methoxy-8-gamma,gamma-dimethylallylflavanone (kenusanone I), 5,2',4'-trihydroxy-6'',6''-dimethyldihydropyrano [2'',3'': 7,8] flavanone (kenusanone J), sophoraflavanones C and D, sophoronol, echinoisosophoranone, scopoletin, scoparone, liquilitigenin, genistein, licoisoflavone A, 2-(2',4'-dihydroxyphenyl)-5,6-methylenedioxybenzofuran, caffeic acid ester and sophoracarpan B as stem constituents.