1,6-Dimethyl-2-carbomethoxy-5-isopropenyl-5-norbornene 68698-57-7 Bicyclo(2.2.1)hept-5-ene-2-carboxylic acid, 1,6-dimethyl-5-(1-methylethenyl)-, methyl ester EINECS 272-085-4 Methyl 1,6-dimethyl-5-(1-methylvinyl)bicyclo(2.2.1)hept-5-ene-2-carboxylate Methyl vetivate