.alpha.-Cyclopiazonic acid 18172-33-3 9H-Pyrrolo[1',2':2,3]isoindolo[4,5,6-cd]indol-9-one, 10-acetyl-2,6,6a,7,11a,11B-hexahydro-11-hydroxy-7,7-dimethyl-, (6a.alpha.,11a,11b.alpha.)- 9H-Pyrrolo[1',2':2,3]isoindolo[4,5,6-cd]indol-9-one, 10-acetyl-2,6,6a,7,11a,11b-hexahydro-11-hydroxy-7,7-dimethyl-, (6a.alpha.,11a.beta.,11b.alpha.)- Cyclopiazonic acid NSC117181