2-Butenoic acid, ethyl ester, (2E)- 2-Butenoic acid, ethyl ester, (E)- 2-Butenoic acid, ethyl ester, (E)- (9CI) 4-02-00-01500 (Beilstein Handbook Reference) 623-70-1 77825-56-0 BRN 0635834 Crotonate d'ethyle, (E)- Crotonic acid, ethyl ester, (E)- EINECS 210-808-7 ETHYL CROTONATE Ethyl (E)-2-butenoate Ethyl (E)-crotonate Ethyl 2-butenoate, (E)- Ethyl crotonate (E) Ethyl trans-2-butenoate Ethyl trans-crotonate alpha-Crotonic acid ethyl ester, (E)- trans-2-Butenoic acid ethyl ester