朝藿素b和朝藿素c的结构

从朝鲜淫羊藿(epeimediumkoreanumnadai)地上部分中分离得到二个新黄酮成分:朝藿素b(epimedokoreaninb)(ix)和朝藿素c(epimedokoreaninc)(xv),经光谱分析证明,朝藿素b(ix)的结构为5,7,3`,4`-tetrahydroxyl-8,5`,-diprenylflavone;朝藿素c(xv)的结构为5,7,31`,7`-tetrahydroxyl-8-prenyl-2｛[2`-(l-hydroxyl-l-methylethyl)-2`,3`-dihydrobenzofuran]-5`-yl｝-chromone.