Furanone, morpholinone and tetrahydrofuran derivatives from the marine-derived fungus Talaromyces sp. PSU-MF07

Three new compounds including one furanone, one morpholinone and one tetrahydrofuran together with three known compounds were isolated from the broth extract of the marine-derived fungus Talaromyces sp. PSU-MF07. The structures of the isolated compounds were determined on the basis of spectroscopic methods. The relative configuration was assigned using NOEDIFF data whereas the absolute configurations were established by Mosher's method, specific rotations and electronic circular dichroism (ECD) data. Some isolated compounds were tested for antimicrobial activity. Only known penioxalicin exhibited weak antibacterial activity against methicillin-resistant Staphylococcus aureus SK1 with an MIC value of 200 mu g/mL.