The molecule is a member of alpha-cyclopiazonic acids. It is a conjugate acid of an alpha-cyclopiazonate. It is a tautomer of a (6aR,11aS,11bR)-10-acetyl-11-hydroxy-7,7-dimethyl-2,6,6a,7,11a,11b-hexahydro-9H-pyrrolo[1',2':2,3]isoindolo[4,5,6-cd]indol-9-one.
(2R,3S,5Z,9R)-5-(1-hydroxyethylidene)-8,8-dimethyl-7,16-diazapentacyclo[9.6.1.02,9.03,7.015,18]octadeca-1(17),11(18),12,14-tetraene-4,6-dione