2-Butenoic acid, 3-methyl-4-oxo-, ethyl ester, (2E)-
2-Butenoic acid, 3-methyl-4-oxo-, ethyl ester, (E)-
Fumaraldehydic acid, 3-methyl-, ethyl ester
Ethyl (2E)-3-methyl-4-oxo-2-butenoate
Ethyl (E)-3-methyl-4-oxocrotonate
Ethyl trans-3-methyl-4-oxo-2-butenoate
Ethyl trans-3-methyl-4-oxocrotonate
Ethyl (E)-4-oxo-3-methyl-2-butenoate
Ethyl (E)-3-methyl-4-oxo-2-butenoate
Ethyl (2E)-3-methyl-4-oxobut-2-enoate
Ethyl (E)-3-methyl-4-oxo-2-butenoate
Ethyl trans-3-methyl-4-oxo-2-butenoate