Abstract
Two new dihydroisocoumarin derivatives, aspergillumarins A and B (1 and 2), were isolated from the culture broth of a marine-derived fungus Aspergillus sp., which was isolated from the fresh leaf of the mangrove tree Bruguiera gymnorrhiza collected from the South China Sea. The structures of compounds 1 and 2 were established by comprehensive analysis of the spectral data, especially 2D NMR spectra results. Compounds 1 and 2 showed weak antibacterial activity against Staphylococcus aureus and Bacillus subtilis at a concentration of 50 μg/mL.
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