Monomeric and dimeric dibenzofurans from cultured mycobionts of Lecanora iseana

The spore-derived mycobionts of the lichen Lecanora iseana were cultivated on a malt-yeast extract medium supplemented with 10% sucrose. The investigation of the metabolites resulted in isolation of four new dibenzofurans 1-4, as well as six known compounds, 3,7-dihydro-1,9-dimethyldibenzofuran (5) five norlichexanthone derivatives.