Nidulaxanthone A, a xanthone dimer with a heptacyclic 6/6/6/6/6/6/6 ring system from Aspergillus sp.-F029

This is the authors' abstract. We don't add key points for this paper.

Nidulaxanthone A ( 1 ), a xanthone dimer bearing an unprecedented heptacyclic 6/6/6/6/6/6/6 system, together with a new monomeric nidulalin D ( 2 ) and four known analogues ( 3 , 4 , 5 and 6 ), were isolated from Aspergillus sp. F029.