From the root of Scutellaria discolor COLEBR., two new flavones (I and II) were isolated together with pinocembrin, 7-hydroxy-5, 8-dimethoxyflavone, 5, 7, 4'-trihydroxy-8-methoxyflavone, 5, 7, 2'-trihydroxy-8, 6'-dimethoxyflavone and norwogonin 7-O-β-D-glucuronopyranoside. Compounds I and II were identified as 7-hydroxy-5, 8, 2'-trimethoxyflavone and 5, 7-dihydroxy-8, 2', 6'-trimethoxyflavone, respectively, based on spectral and chemical data.
从黄芩(Scutellaria discolor COLEBR.)的根部中分离出两种新的
黄酮(I和II),以及
松属素(pinocembrin)、7-羟基-5,8-二甲氧基
黄酮(7-hydroxy-5,8-dimethoxyflavone)、5,7,4'-三羟基-8-甲氧基
黄酮(5,7,4'-trihydroxy-8-methoxyflavone)、5,7,2'-三羟基-8,6'-二甲氧基
黄酮(5,7,2'-trihydroxy-8,6'-dimethoxyflavone)和去甲
黄芩素-7-O-β-
D-葡萄糖醛酸苷(norwogonin 7-O-β-D-glucuronopyranoside)。根据光谱和
化学数据,化合物I和II分别被鉴定为7-羟基-5,8,2'-
三甲氧基黄酮(7-hydroxy-5,8,2'-trimethoxyflavone)和5,7-二羟基-8,2',6'-
三甲氧基黄酮(5,7-dihydroxy-8,2',6'-trimethoxyflavone)。