Abstract: Five compounds were isolated from the extract of the deep-sea-derived fungus Penicillium herquei FS83 by utilizing various chromatographic methods such as silica gel,reverse silica gel,Sephadex LH-20,preparative TLC and HPLC.Their structures were identified as peniherin A (1),sclerodin (2),methyl (4-OH) phenylacetate (3),4-hydroxyacetophenone (4),(R)-mevalonolactone (5),respectively,by spectroscopic data.Compound 1 was identified as a new compound,and compound 2 was isolated from Penicillium for the first time.No cytotoxic and antibacterial activities were detected for compound 1.

Key words: Penicillium herquei, deep-sea-derived fungus, secondary metabolites, isocoumarin