Synonyms: 6H-Pyrrolo[1',2':2,3]isoindolo[4,5,6-cd]indole-9,11(2H,10H)-dione,6a,7,11a,11b-tetrahydro-10-(1-hydroxyethylidene)-7,7-dimethyl-,(6aR,10Z,11aS,11bR)-rel- (9CI);6H-Pyrrolo[1',2':2,3]isoindolo[4,5,6-cd]indole-9,11(2H,10H)-dione,6a,7,11a,11b-tetrahydro-10-(1-hydroxyethylidene)-7,7-dimethyl-, (6aa,10Z,11ab,11ba)-; Cyclopiazonic acid; a-Cyclopiazonic acid