Aspergillus brunneus is a species of fungus in the genus Aspergillus. It is from the Aspergillus section. The species was first described in 1893. It has been reported to produce asperflavin, asperentins, auroglaucin, bisanthrons, dihydroauroglaucin, echinulins, 5-farnesyl-5,7-dihydroxy-4-methylphthalide, erythroglaucin, flavoglaucin, isoechinulins, mycophenolic acid, neoechinulins, physcion, questin, tetracyclic, and tetrahydroauroglaucin.

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