2-Butenoic acid, 3-methyl-, ethyl ester 638-10-8 Crotonic acid, 3-methyl-, ethyl ester Ethyl .beta.,.beta.-dimethylacrylate Ethyl 3,3-dimethylacrylate Ethyl 3-methyl-2-butenoate Ethyl 3-methylcrotonate Ethyl dimethylacrylate Ethyl isobutenoate Ethyl isopropylideneacetate Ethyl senecioate NSC99208