1-(2,6,6-Trimethyl-3-cyclohexen-1-yl)ethan-1-one 25915-53-1 3,5,5-Trimethyl-4-acetylcyclohexene EINECS 247-343-4 Ethanone, 1-(2,6,6-trimethyl-3-cyclohexen-1-yl)-