2-<<2-(chloromethyl)-1,3-dimethyl-2-cyclohexen-1-yl>methyl>-1,3-dioxolane

2,6-Dimethyl-6-(2-oxo-ethyl)-cyclohex-1-enecarboxylic acid methyl ester

methyl 2-allyl-2-methyl-6-oxocyclohexanecarboxylate