Studies on Nepalese crude drugs. V. On the flavonoid constituents of the root of Scutellaria discolor COLEBR.
作者:TSUYOSHI TOMIMORI、YUKINORI MIYAICHI、YOSHITAKA IMOTO、HARUHISA KIZU、TSUNEO NAMBA
DOI:10.1248/cpb.33.4457
日期:——
Four new flavanones (I-IV) and a new chalcone (V) were isolated from the root of Scutellaria discolor COLEBR., together with wogonin, norwogonin, 5, 7, 2'-trihydroxy-8-methoxyflavone, 5, 7-dihydroxy-8, 2'-dimethoxyflavone and wogonin 7-O-glucuronide. The structures of I-V were shown to be 2 (S)-5, 7-dihydroxy-8, 2'-dimethoxyflavanone, 2 (S)-7-hydroxy-5, 8, 2'-trimethoxyflavanone, (±)-5, 2'-dihydroxy-7, 8, 6'-trimethoxyflavanone, (±)-5, 2'-dihydroxy-6, 7, 6'-trimethoxyflavanone and 2', 4'-dihydroxy-2, 3', 6'-trimethoxychalcone, respectively, based on spectral data and simple chemical modifications.
从黄芩(Scutellaria discolor COLEBR.)的根中分离出四种新的黄烷酮(I-IV)和一种新的查尔酮(V),以及沃戈宁(wogonin)、诺沃戈宁(norwogonin)、5,7,2'-三羟基-8-甲氧基黄酮(5,7-dihydroxy-8,2'-dimethoxyflavone)和沃戈宁 7-O-葡萄糖醛酸(wogonin 7-O-glucuronide)。I-V 的结构为 2 (S)-5,7-二羟基-8,2'-二甲氧基黄烷酮、2 (S)-7-羟基-5,8,2'-三甲氧基黄烷酮、(±)-5,2'-二羟基-7,8,6'-三甲氧基黄烷酮、根据光谱数据和简单的化学修饰,分别得到了 (±)-5,2'-二羟基-6,7,6'-三甲氧基黄烷酮和 2',4'-二羟基-2,3',6'-三甲氧基查尔酮。