Bisanthraquinone metabolites produced by the endophytic fungus Diaporthe sp.

Abstract

Two bisanthraquinones named (+)-epicytoskyrin (1) and (+)-1,1′- bislunatin (2) were produced by the endophytic fungus from a tea plant, which is a species closely related to Diaporthe phaseolorum strain sw-93-13. The chemical structures of the metabolites were elucidated on the basis of the physicochemical properties including the circular dichroism (CD) spectrum. © 2006 Pharmaceutical Society of Japan.