英文别名Cefixime impurity 18; (Z)-2-hydroxyimino-3-oxo-butyric acid tert-butyl ester; Cefixime-2-hydroxyimino tertiary butyl acetoacetate impurity; Butanoic acid, 2-(hydroxyimino)-3-oxo-, 1,1-dimethylethyl ester, (2Z)-; tert-butyl 2-hydroxyimino-3-oxobutyrate; tert-butyl (Z)-2-hydroxyimino-3-oxobutyrate; 2-Hydroxyiminoacetoacetic acid-tert-butylester; t-butyl-2-hydroximino-3-oxobutyrate; 2-hydroxyimino-3-oxo-butyric acid tert-butyl ester; tert-butyl 2-(hydroxyimino)-3-oxo-butanoate 
