Constituents of the higher fungi. Part XVI. Bulgarhodin and Bulgarein, novel benzofluoranthenequinones from the fungus Bulgaria inquinans(Fries)

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Abstract
Three crystalline quinones have been isolated from the fungus Bulgaria inquinans. Two of these have been identified as derivatives of benzo[j]fluoranthene and the third characterised as 4,9-dihydroxyperylene-3,10-quinone. This is the first recorded isolation of a natural product with structure based on the benzofluoranthene nucleus.