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在前一报中,我们报导了用液、液萃取法及反流分布法将茶条槭提取物分成九个组分。其中组分(1)、(3)、(4)、(6)具有抗菌作用,尤其以(3)号组分含量高,抗菌活性强。本文报导(3)号组分的进一步分离及结构鉴定工作。将(3)号组分溶于少量热乙醇中,放冷,析出结晶A。母液回收溶剂后,再用正丁醇—醋酸—水(4:1:5)为溶剂系统进行第二次反流分布,得到结晶B及少量结晶A。
In the previous report, we reported the use of liquid, liquid extraction, and reflux distribution methods to separate the tea plant extract into nine components. Among them, components (1), (3), (4), and (6) have antibacterial effects, especially with high content of component (3) and strong antibacterial activity. This article reports on the further separation and structural identification of component (3). The component (3) was dissolved in a small amount of hot ethanol and left to cool to precipitate crystals A. After the solvent was recovered from the mother liquor, a second refluxing distribution was performed using n-butanol-acetic acid-water (4:1:5) as a solvent system to obtain crystals B and a small amount of crystals A.