Hydroquinone derivatives from the marine-derived fungus Gliomastix sp.
作者:Mohamed S. Elnaggar、Weaam Ebrahim、Attila Mándi、Tibor Kurtán、Werner E. G. Müller、Rainer Kalscheuer、Abdelnasser Singab、Wenhan Lin、Zhen Liu、Peter Proksch
DOI:10.1039/c7ra04941b
日期:——
measurements aided by DFT NMR calculations as well as MS data. TDDFT-ECD and OR calculations were performed to determine the absolute configurations of 1 and the aglycones of 6 and 7. Compound 1 features a novel skeleton, biogenetically derived from a Diels–Alder reaction between derivatives of 11 and 13. Compound 2 represents a rare sulfur-containing alkaloid derived from the known hydroquinone 13. Compounds
八个新氢醌衍生物,gliomastins A-d(1-4),9- Ô -methylgliomastin C(5),acremonin 1- ö -β- d吡喃葡萄糖苷(6),gliomastinÈ1- ö -β- d -从海洋真菌Gliomastix中分离了吡喃葡萄糖苷(7)和6'- O-乙酰基异异丁烯丁酸酯(8)以及7种已知类似物。sp。通过广泛的光谱分析(包括1D和2D NMR测量,借助DFT NMR计算以及MS数据)阐明了它们的结构。进行TDDFT-ECD和OR计算以确定1的绝对构型和6和7的糖苷配基。化合物1具有新颖的骨架,该骨架从11和13的衍生物之间的Diels-Alder反应生物发生。化合物2代表衍生自已知对苯二酚13的稀有含硫生物碱。化合物1,10和12对L5178Y小鼠淋巴瘤细胞系表现出较强的细胞毒性,IC 50值分别为1.8、1.0和1.1μM。化合物3表现出对结核分枝杆菌的中等抗结核活性,MIC值为12