2-Butenoic acid, 3-methyl-, ethyl ester 3,3-Dimethylacrylic acid ethyl ester 4-02-00-01556 (Beilstein Handbook Reference) 638-10-8 AI3-32913 BRN 1744854 CROTONIC ACID, 3-METHYL-, ETHYL ESTER EINECS 211-319-1 Ethyl 3,3-dimethylacrylate Ethyl 3-methyl-2-butenoate Ethyl 3-methylcrotonate Ethyl beta,beta-dimethylacrylate Ethyl beta-methylcrotonate Ethyl isobutenoate Ethyl isopropylidene acetate Ethyl isopropylideneacetate Ethyl senecioate NSC 61853 NSC 99208