Butanoic acid, 2-oxo-, ethyl ester
Butyric acid, 2-oxo-, ethyl ester
Ethyl 2-oxobutyrate
Ethyl α-oxobutyrate
Ethyl α-ketobutyrate
Ethyl 3-methylpyruvate
Ethyl 2-ketobutyrate
Ethyl α-oxobutanoate
Ethyl 2-oxobutanoate
2-Oxobutanoic acid ethyl ester
2-Oxobutyric acid ethyl ester