作者:Zhen-Zhu Zhao、Kai-Yue Han、Zheng-Hui Li、Tao Feng、He-Ping Chen、Ji-Kai Liu
DOI:10.1016/j.phytol.2019.02.007
日期:2019.4
the fermentation broth of the fungus Stereum hirsutum led to the isolation of ten steroids, including two previously unreported ones, namely steresterones A (1) and B (2). The semi-synthesis products 3a and 3b were prepared by reduction of the known compound 3 with NaBH4. Their structures and absolute configurations were established via 1D & 2D NMR spectroscopic analysis, and TDDFT/ECD calculations
对真菌Shirum hirsutum的发酵液进行植物化学研究导致分离出十种类固醇,包括两种以前未报道的类固醇,即甾体酮A(1)和B(2)。通过将已知化合物3用NaBH 4还原来制备半合成产物3a和3b。通过1D和2D NMR光谱分析,TDDFT / ECD计算以及单晶X射线衍射分析确定了它们的结构和绝对构型。的结构3,其窝藏5 β首次通过单晶X射线衍射分析确认了-H。评估了这项研究中报道的所有化合物对五种人类癌细胞系的细胞毒性。生物测定结果表明,3,4,6-9显示具有IC显著抗增殖作用50个值改变从2.3至34.3微米。的结构-活性关系3,图3a,3b中进行了讨论。