Psychrophilins E–H and Versicotide C, Cyclic Peptides from the Marine-Derived Fungus <i>Aspergillus versicolor</i> ZLN-60
作者:Jixing Peng、Huquan Gao、Xiaomin Zhang、Shuai Wang、Chongming Wu、Qianqun Gu、Peng Guo、Tianjiao Zhu、Dehai Li
DOI:10.1021/np500469b
日期:2014.10.24
Four new cyclic peptides, psychrophilins E-H (1-4), possessing a rare amide linkage between the carboxylic acid in anthranilic acid (ATA) and the nitrogen from an indole moiety, along with a new ATA-containing hexapeptide, versicotide C (5), were obtained from the culture of the marine-derived fungus Aspergillus versicolor ZLN-60. The structures, including absolute configurations, were elucidated by a combination of HRESIMS, NMR, X-ray crystallography, TDDFT ECD calculations, and Marfey's method. Versicotide C (5) is the first natural cyclic hexapeptide containing two anthranilic acids. Compounds 1-5 were not cytotoxic, and compound 3 showed potent lipid-lowering effects.