Synonyms: 2-Cyclohexen-1-one,4-hydroxy-3,5,5-trimethyl-4-(3-oxo-1-butenyl)-, (E)-; 2-Cyclohexen-1-one,4-hydroxy-3,5,5-trimethyl-4-(3-oxo-1-butenyl)-, (E)-(?à)- (8CI); 2-Cyclohexen-1-one,4-hydroxy-3,5,5-trimethyl-4-[(1E)-3-oxo-1-butenyl]- (9CI); 1-Hydroxy-4-keto-a-ionone;4-(1-Hydroxy-4-keto-2,6,6-trimethyl-2-cyclohexen-1-yl)-3-buten-2-one; PBI 344