607-97-6 Acetoacetic acid, 2-ethyl-, ethyl ester Butanoic acid, 2-ethyl-3-oxo-, ethyl ester Ethyl .alpha.-acetylbutyrate Ethyl .alpha.-ethylacetoacetate Ethyl 2-acetylbutyrate Ethyl 2-ethyl-3-ketobutyrate Ethyl 2-ethylacetoacetate NSC53775