英文别名ETHYL 4-CHLORO-2-HYDROXYIMINO-3-OXO-BUTYRATE; Cefazolin Impurity 34; Butanoic acid, 4-chloro-2-(hydroxyimino)-3-oxo-, ethyl ester, (2Z)-; Cefozopran impurity 34; ethyl 2-hydroxyimino-3-oxo-4-chlorobutyrate; ethyl 4-chloro-2-hydroxyimino-3-oxobutyrate; ethyl 4-chloro-2-oximinoacetoacetate; 4-chloro-2-(Z)-hydroxyimino-3-oxo-butyric acid ethyl ester; (Z)-γ-chloro-β-oxo-α-hydroxyiminobutyric acid ethyl ester 
