Synonyms: VELTONAL;2-BUTENAL, 2-METHYL-4-(2,6,6-TRIMETHYL-2- CYCLOHEXEN-1-YL)-;2-methyl-4-(2,6,6-trimethyl-2-cyclohexen-1-yl)-2-butenal;1-(3-Formyl-2-butenyl)-2,6,6-trimethylcyclohexan-2-ene;2-Methyl-4-(2,6,6-trimethyl-2-cyclohexenyl)-2-butenal;Einecs 271-439-5