The isolation and structure elucidation of four new metabolites (14) are described. The structures were determined employing 2D NMR spectroscopy. The isolation of these onusual metabolites from Phomn lingua may have chemotaxonomic implications. The blackleg fungus [Leptosphaeria maculans (Desm.) Ces. et & Not., asexual stage Phoma lingam (T&e ex Fr.) Desm.] causes widespread destruction among cruciferous crops and can be particularly devastating for canola (Brassica napus and B. campestris ).* While virulent isolates of the fungus am readily recognized by their biosynthesis of epipolythiodioxopiperazines, no characteristic metabolites appear to have been isolated from weakly virulent isolates. 293 In continuation of our studies of the chemistry of P. lingam,4-6 we have investigated a weakly virulent isolate that produce8 yellow pigments, both in liquid and in solid media. Now we describe the structure elucidation of phomaligols A (1) and At (2), and phomaligadiones A (3a/3b) and B (4), new polyketides isolated from the blackleg fungus. The isolation of these metabolites for the first time from a weakly virulent isolate may have chemotaxonomic implications.