Abstract
Three undescribed azaphilones, phomopsones A-C (1–3) and two known azaphilones (4–5) were isolated from the culture of endophytic fungus Phomopsis sp. CGMCC No.5416 from the stems of Achyranthes bidentata. Their structures were determined by spectroscopic analysis (HRESIMS, 1D and 2D NMR), and the absolute configurations were determined by CD spectroscopy. Compounds 2 and 3 showed significant inhibitory activities against HIV-1 with against HIV-1 with IC50 values of 7.6 and 0.5 μmol/L, respectively. Compounds 2 and 3 also displayed moderate cytotoxicity with CC50 values of 3.2–303 μmol/L against A549, MDA-MB-231 and PANC-1 cell lines. Moreover, compound 3 can induce the early apoptosis of PANC-1 cancer cells with the apoptosis rate of 28.54%.
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