1-Penten-3-one, 4-methyl-1-(2,6,6-trimethyl-2-cyclohexen-1-yl)- 4-Methyl-1-(2,6,6-trimethyl-2-cyclohexen-1-yl)pent-1-en-3-one 5-(2,6,6-Trimethyl-2-cyclohexen-1-yl)-2-methyl-4-penten-3-one 68459-99-4 EINECS 270-623-2