The structure of ester of 2-hydroxy-4-methoxy-6-methylbenzoic acid with 6-acetoxy-7-hydroxy-7-methyl-3-propenyl-3,4,5,6,7,8-hexahydro-1 H-benzo[e]pyran-8-one ( 1) is assigned to wortmin, a new member of the sclerotiorin group of metabolites, produced by Penicillium wortmanni Klöcker.