67392-15-8 Bicyclo(2.2.2)oct-5-ene-2-carboxylic acid, 1-methyl-4-(1-methylethyl)-, methyl ester EINECS 266-678-7 Methyl 1-methyl-4-(1-methylethyl)bicyclo(2.2.2)oct-2-ene-6-carboxylate Methyl 4-isopropyl-1-methylbicyclo(2.2.2)oct-5-ene-2-carboxylate