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Chromone-Derived Polyketides from the Deep-Sea Fungus Diaporthe phaseolorum FS431
Heng Guo1,2, Zhao-Ming Liu3, Yu-Chan Chen4
1State Key Laboratory of Applied Microbiology Southern China, Guangdong Provincial Key Laboratory of Microbial Culture Collection and Application, Guangdong Open Laboratory of Applied Microbiology, Guangdong Institute of Microbiology, Guangzhou 510070, China. hengeguo163@163.com.
Abstract:
Five new chromone-derived polyketides phaseolorins A-F (1⁻5), together with nine known compounds, were isolated from the deep-sea derived fungus Diaporthe phaseolorum FS431. The structures of new compounds were determined by analysis of their NMR and high-resolution electrospray ionization mass spectroscopy (HRESIMS) spectroscopic data. The absolute configurations were confirmed by chemical transformations, extensively experimental electron capture detection (ECD) calculations, or X-ray crystallography. Among them, compound 2 represented the first example for a new family of chromone derivative possessing an unprecedented recombined five-member γ-lactone ring. Moreover, the new compounds (1⁻5) were evaluated for in vitro cytotoxic activities against a panel of human cancer cell lines.
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