Title
New cytotoxic tricycloalternarenes from fungus Alternaria brassicicola
Author
Fengli Li, Ying Tang, Weiguang Sun, Jiankun Guan, Yuanyuan Lu, Sitian Zhang, Shuang Lin, Jianping Wang, Zhengxi Hu, Yonghui Zhang
Year
2019
Journal
Bioorganic Chemistry
Abstract
Seven previously undescribed metabolites, designated as tricycloalternarenes Q–W (1–7), were isolated and identified from the fermented rice substrate of fungus Alternaria brassicicola. The planar and absolute structures of all new compounds were determined on the basis of extensive NMR spectroscopic data, a modified Mosher’s method, X-ray crystallographic analysis, and electronic circular dichroism (ECD) spectral analyses. All the isolates were evaluated for in vitro cytotoxicity against five human tumor MM231, MM468, HeLa, SW1990, and SW480 cell lines, and compounds 1, 2, 5, and 7 showed selective cytotoxicity against certain human tumor cell lines with IC50 values ranging from 12.83 to 32.87 μM, with no obvious cytotoxicity to the normal LO2 cell.
Instrument
J-810
Keywords
Circular dichroism, Natural products, Medicinal, Absolute configuration