105139-93-3 607-97-6 AI3-06006 Acetoacetic acid, 2-ethyl-, ethyl ester (8CI) Butanoic acid, 2-ethyl-3-oxo-, ethyl ester EINECS 210-151-6 Ethyl 2-acetylbutyrate Ethyl 2-ethyl-3-ketobutyrate Ethyl 2-ethylacetoacetate Ethyl alpha-acetylbutyrate Ethyl alpha-ethylacetoacetate NSC 53775