Studies on the metabolites of Penicillium diversum var. aureum. I.

Three new trihydroxytetralones (1, 2 and 3) have been isolated from the culture broth of P.diversum var. aureum together with three known naphthalenones (sclerone, isosclerone and juglone). The structure of 1 was determined on the basis of its chemical properties and spectroscopic analyses of the monomethyl ether (4) and dimethyl ether (5).