(E)-2-Methyl-2-butenoic acid ethyl ester 2-Butenoic acid, 2-methyl-, ethyl ester, (2E)- 2-Butenoic acid, 2-methyl-, ethyl ester, (E)- 4-02-00-01553 (Beilstein Handbook Reference) 5837-78-5 BRN 1720895 Crotonic acid, 2-methyl-, ethyl ester, (E)- Crotonic acid, 2-methyl-, ethyl ester, (E)- (8CI) EINECS 227-425-6 Ethyl (E)-2-methyl-2-butenoate Ethyl (E)-2-methylcrotonate Ethyl 2-methyl-2-butenoate, (E)- Ethyl 2-methylcrotonate Ethyl 2-methylcrotonate, (E)- Ethyl alpha-methylcrotonate Ethyl tiglate Ethyl trans-2-methyl-2-butenoate Ethyl trans-2-methylcrotonate FEMA No. 2460 NSC 55278 Tiglic acid, ethyl ester Tiglic acid, ethyl ester (6CI,7CI)