2-Butenoic acid, 2-methyl-, 2-propenyl ester, (E)- 2-Propenyl 2-methyl-2-butenoate, (E)- 7493-71-2 ALLYL TIGLATE Allyl 2-methylcrotonate Allyl trans-2-methyl-2-butenoate EINECS 231-333-1 FEMA No. 2043 Tiglic acid, allyl ester