Bioactive secondary metabolites from the deep-sea derived fungus Aspergillus sp. SCSIO 41029

Two new compounds classified as one new lumazine peptide, penilumamide K (1) and one new sesquiterpene (2), were obtained from the deep-sea derived fungus Aspergillus sp. SCSIO 41029, together with eleven known compounds (3-13). The structures of 1-13 including absolute configurations were determined by detailed NMR spectroscopy, HR-ESI-MS, chemical derivatization, and optical rotation data. Among them, compound 1 represents the first lumazine peptide reported from deep-sea derived fungus. The bioactive assay exhibited that compounds 1, 3, 4, 5, 7 and 10 had significant potency against alpha-glucosidase with IC50 values ranging from 18.61 to 109.06 mu M. In addition, compounds 4 and 9 showed strong antibacterial activity against Staphylococcus aureus with MIC values of 0.78 and 6.25 mu g ml(-1), respectively.