2-Butenoic acid, 2-methyl-, methyl ester, (E)- 2-Carbomethoxy-2-butene, (E)- 6622-76-0 Crotonic acid, 2-methyl-, methyl ester, (E)- Methyl (E)-2-methylcrotonate Methyl tiglate Methyl trans-2-methyl-2-butenoate NSC55277