4-methyl-cyclohexene-4-carboxylic acid methyl ester, 2-carbomethoxy-1-methylvinyl dimethyl phosphate, 1-carbomethoxy-1-methylcyclohex-3-ene, 3-Cyclohexene-1-carboxylic acid,1-methyl-,methyl ester, dimethyl 2-methoxycarbonyl-1-methylvinyl phosphate, 1-methyl-cyclohex-3-enecarboxylic acid methyl ester, 1-Methyl-3-cyclohexen-1-carbonsaeure-methylester, 1-carbomethoxy-1-propen-2-yl dimethyl phosphate, 1-Methyl-3-cyclohexene-1-carboxylic acid methyl ester, 1-Methyl-cyclohex-3-encarbonsaeure-methylester, methyl 1-methyl-3-cyclohexenecarboxylate