2-Butenoic acid, 2-phenylethyl ester, (2E)- 2-Butenoic acid, 2-phenylethyl ester, (E)- 2-Butenoic acid, phenethyl ester, (E)- 2-Phenethyl crotonate 2-Phenylethyl trans-2-butenoate 68141-20-8 EINECS 268-842-3 Phenethyl crotonate