.alpha.-Methylacetoacetic ester 609-14-3 Acetoacetic acid, 2-methyl-, ethyl ester Butanoic acid, 2-methyl-3-oxo-, ethyl ester Ethyl .alpha.-acetylpropionate Ethyl .alpha.-methylacetoacetate Ethyl .alpha.-methylacetylacetate Ethyl 2-acetylpropionate Ethyl 2-methyl-3-oxobutanoate Ethyl 2-methyl-3-oxobutyrate Ethyl 2-methylacetoacetate Ethyl methylacetoacetate NSC1102