The structures of alboleersin and luteoleersin; the identity of luteoleer-sin with cochlioquinone A

Abstract

Structural studies of alboleersin and luteoleersin, two metabolites of the plant pathogen fungus Helminthosporium leersii, have established that luteoleersin is identical with cochlioquinone A, a metabolite of Cochliobolus miyabeanus, and that alboleersin is the corresponding hydroquinone. A number of derivatives characterizing these metabolites are described.