1,3-Butadiene-methyl acrylate adduct 1-Carbomethoxy-3-cyclohexene 3-Cyclohexene-1-carboxylic acid, methyl ester 6493-77-2 Methyl 1,2,3,6-tetrahydrobenzoate Methyl 3-cyclohexene-1-carboxylate Methyl 3-cyclohexenecarboxylate Methyl 4-cyclohexenecarboxylate NSC93912