To discover new bioactive Sodium- dependent glucose cotransporter 2( SGLT2) inhibitors from the traditional Chinese medicine: Kushen( roots of Sophora flavescens),the bioassay- guided purification of an active methanolic fraction was performed. Seven known flavonoid glycosides were isolated and determined. Their structures were elucidated as formononetin 7- O- β- D- xylopyranosyl-( 1→6)- β- D- glucopyranoside( 1),formononetin 7- O- β- D- apiofuranosyl-( 1→6)- β- D- glucopyranoside( 2),trifolirhizin( 3),(-)-...