1-[[(6R,7R)-7-[[(2Z)-2-(2-Amino-4-thiazolyl)-2-[[2-(1,1-dimethylethoxy)-1,1-dimethyl-2-oxoethoxy]imino]acetyl]amino]-2-carboxy-8-oxo-5-thia-1-azabicyclo[4.2.0]oct-2-en-3-yl]methyl]pyridinium inner salt
Ceftazidime Ep Impurity E
Ceftazidime tert-butyl ester
Ceftazidime Impurity E (EP) (Ceftazidime t-Butyl Ester )