Three 2′,4′,6′-Trioxygenated flavanones in roots of Echinosophora koreensis

摘要: Abstract Further investigation of the phenolic constituents roots Echinosophora koreensis , led to isolation 11 compounds. Their structures were determined as (2 S )-6-geranyl-5,7,2′,4′,6′-pentahydroxyflavanone (sophoraflavanone D), )-8-geranyl-5,7,2′,4′,6′-pentahydroxyflavanone E), )-6,8-di(γ,γ-dimethylallyl)-5,7,2′,4′,6′-pentahydroxyflavanone (kenusanone B), sophoraisoflavanone A, isosophoranone, 2,3-dehydrokievitone, sophoracarpane B, sophoronol, pratensein, genistein and scopoletin. Three them are novel flavanones possessing a 2′,4′,6′-trihydroxyl moiety on B ring.