竹子内生真菌Fusarium oxysporum次级代谢产物的研究

[目的]对竹子内生真菌尖孢镰刀菌Fusarium oxysporum的次级代谢产物进行分离与鉴定。[方法]运用硅胶柱色谱、Sephadex LH-20凝胶色谱、制备液相色谱等方法进行分离纯化,根据理化性质和波谱技术对化合物的结构进行鉴定。[结果]从该菌的次级代谢产物中分离得到9个化合物,分别鉴定为1-(3, 4-二甲氧基苯基)-乙酮(1)、吲哚-3-乙酸乙酯(2)、吲哚-3-乙酸(3)、吲哚-3-乙酮(4)、吲哚-3-乙酸甲酯(5)、latifolicinin C(6)、白僵菌素(7)、1, 3-diamino-1, 3-dimethylurea(8)和2, 3-丁二醇(9)。[结论]除化合物3、7、9外,其余化合物均为首次从竹子内生真菌Fusarium oxysporum中分离得到。

Identification of antioxidant activity of two new aromatic ring butyrolactone derivatives from Dictamnus dasycarpus Turcz

The present study carried out a phytochemical investigation on the root barks of Dictamnus dasycarpus Turcz, leading to the isolation and characterization of two new aromatic ring butyrolactone derivatives, dasycarpusphenol acid A(1) and dasycarpusphenol acid B(2). Their structures were elucidated by using spectroscopic techniques and HR-FAB-MS. Compounds 1 and 2 exhibited antioxidant activity, with their IC_(50) values being 28.95 and 41.76 mg·mL^(-1),respectively.