2-Methoxyimino-3-oxobutyric acid tert-butyl ester

2-(Methoxyimino)-3-oxo-butanoic Acid 1,1-Dimethylethyl Ester is an intermediate used in the synthesis of Cefotaxime Bromoacetyl Analogue (C242940), which is an impurity of Cefotaxime (C242950), a broad spectrum third generation cephalosporin antibiotic.