荔枝草化学成分的分离和结构鉴定及其抗氧化性能的研究

Isolation and Identification of the Compounds from Lizhicao and their Antioxidant Properties

经过有机溶剂的提取、柱色谱、薄层色谱的分离，以及结晶和重结晶的纯化，从荔枝草（ＳａｌｖｉａｐｌｅｂｅｉａＲ．Ｂｒ．）中得到三个纯化合物，通过紫外、红外、质谱和核磁共振光谱及元素分析的鉴定，发现一个新的二萜类化合物Ⅰ，木香醌酸和两个已知黄酮类化合物Ⅱ，半齿泽兰素和Ⅲ，高前车素．这三种化合物中，木香醌酸表现出较弱的抗氧化活性，后两种黄酮化合物几乎没有抗氧化活性．

Three compounds are isolated from Lizhicao (Salvia plebeia R. Br.) by organic solvent extraction, column chromatography, TLC, crystallisation and recrystallisation. They are identified as a novel diterpene I, royleanonic acid, two known flovonoids II, eupatorin and III, hispidulin by UV, IR, MS, and NMR spectroscopic methods and element analysis. The diterpene demonstrates some antioxidant properties, but the two flovonoids do not have any antioxidant property.