Butanoic acid,2,2-diethyl-3-oxo-,ethyl ester, Diethyl acetoacetate, 2,2-diethyl-3-oxo-butanoic acid,ethyl ester, 2,2-diethyl-3-oxo-butyric acid ethyl ester, ethyl 2,2-diethylacetoacetate, 2,2-Diaethyl-acetessigsaeure-aethylester, Butanoic acid, 2,2-diethyl-3-oxo-, ethyl ester