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(E)-Cefpodoxime Proxetil CefpodoxiMe Proxetil IMpurity D Cefpodoxime Proxetil EP Impurity D Cefpodoxime Proxetil Ep Impurity D ( Ant Cefpodoxime Proxetil Impurity 4（EP Impurity D） Cefpodoxime Proxetil Impurity 4(Cefpodoxime Proxetil EP Impurity D) (6S,7S)-1-((isopropoxycarbonyl)oxy)ethyl 7-((E)-2-(2-aminothiazol-4-yl)-2-(methoxyimino)acetamido)-3-(methoxymethyl)-8-oxo-5-thia-1-azabicyclo[4.2.0]oct-2-ene-2-carboxylate 1-propan-2-yloxycarbonyloxyethyl (6R,7R)-7-[[(2E)-2-(2-amino-1,3-thiazol-4-yl)-2-methoxyiminoacetyl]amino]-3-(methoxymethyl)-8-oxo-5-thia-1-azabicyclo[4.2.0]oct-2-ene-2-carboxylate 5-Thia-1-azabicyclo[4.2.0]oct-2-ene-2-carboxylic acid, 7-[[(2E)-2-(2-amino-4-thiazolyl)-2-(methoxyimino)acetyl]amino]-3-(methoxymethyl)-8-oxo-, 1-[[(1-methylethoxy)carbonyl]oxy]ethyl ester, (6R,7R)- Cefpodoxime proxetil Impurity D: (6R,7R)-7-[[(2E)-2-(2-Amino-4-thiazolyl)-2-(methoxyimino)acetyl]amino]-3-(methoxymethyl)-8-oxo-5-thia-1-azabicyclo[4.2.0]oct-2-ene-2-carboxylic Acid 1-[[(1-Methylethoxy)carbonyl]oxy]ethyl Ester((E)-Cefpodoxime Proxetil) Cefpodoxime Proxetil impurity 4/Cefpodoxime?Proxetil?EP?Impurity D/(E)-Cefpodoxime Proxetil/(R)-1-((isopropoxycarbonyl)oxy)ethyl (6R,7R)-7-((E)-2-(2-aminothiazol-4-yl)-2-(methoxyimino)acetamido)-3-(methoxymethyl)-8-oxo-5-thia-1-azabicyclo[4.2.0]oct-2-ene-