Synonyms: 2-Butenoicacid, 2-methyl-, methyl ester, (E)-; Crotonic acid, 2-methyl-, methyl ester,(E)- (8CI); Tiglic acid, methyl ester (6CI,7CI); (E)-Methyl2-methyl-2-butenoate; Methyl (E)-2-methylcrotonate; Methyl tiglate; Methyltrans-2-methyl-2-butenoate; Methyl trans-2-methylcrotonate; Methyl a-methylcrotonate; NSC 55277