A new chlorinated diphenyl ether and five known polyketide metabolites from Penicillium griseofulvum cib-119.

A series of polyketide metabolites (1-6), including a new chlorinated diphenyl ether (4-chloro-7,4'-dihydroxy-5,2'-dimethoxy-2-methylformate-6'-methybenzophone, 1), were isolated from the solid-fermented rice culture of Penicillium griseofulvum cib-119. The structure of compound 1 was determined on the basis of NMR spectra and single-crystal X-ray diffraction analyses. In addition, compound 1 showed weak cytotoxic activity against prostatic carcinoma cell (PC-3). Compounds 3-5 exhibited significant antimicrobial activities against Staphylococcus aureus and Bacillus subtilis.