New azaphthalide and phthalide derivatives from the marine coral-derived fungus Aspergillus sp. SCSIO41405

A new azaphthalide derivative, (S)-3-hydroxy-2,7-dimethylfuro [3,4-b]pyridin-5(7H)-one (1), and a new phthalide derivative, (S)-7-hydroxy-3-((S)-1-hydroxyethyl)isobenzofuran-1(3H)-one (2), were isolated from the coral-derived fungus Aspergillus sp. SCSIO41405, together with eight known compounds (3-10). Their structures, including absolute configurations, were determined by NMR and MS spectroscopic analyses, optical rotation, calculated electronic circular dichroism (ECD) and X-ray crystal data. The isolated compounds were examined for antibacterial and enzyme inhibition activities. Compounds 7 and 8 exhibited weak antibacterial activities, and 10 displayed moderate inhibition on pancreatic lipase with an IC50 value of 15.6 mu g/mL.