2-Butenoic acid, 2-methyl-, 3-phenyl-2-propenyl ester, (2E)- 2-Butenoic acid, 2-methyl-, 3-phenyl-2-propenyl ester, (E,?)- 61792-12-9 Cinnamyl 2-methylcrotonate Cinnamyl tiglate EINECS 263-215-0