2-Butanone, 4-(2,6,6-trimethyl-1,3-cyclohexadien-1-yl)- 20483-36-7 4-(2,6,6-Trimethyl-1,3-cyclohexadien-1-yl)-2-butanone 4-(2,6,6-Trimethyl-1,3-cyclohexadien-1-yl)butan-2-one Dehydrodihydroionone Dihydrodehydro-beta-ionone EINECS 243-847-3 FEMA No. 3447