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UNII-4I89S39HC0 Cefuroxime EP Impurity H (Z)-N-((5aR,6R)-1,7-dioxo Cefuroxime Axetil EP Imp E Cefuroxim Sodium impurity H Cefuroxime axetil impurity E efuroxime Axetil EP Impurity E Cefuroxime Axetil EP Impurity E Cefuroxime Axetil Impurity E (EP) E-isomers (Cefuroxime Axetil Impurity) Cefuroxime Axetil Impurity E (EP)（Cefuroxime Lactone） Cefuroxime Sodium EP Impurity H(Cefuroxime Axetil EP Impurity E) Cefuroxime Axetil EP Impurity E (Cefuroxime Sodium EP Impurity H) Cefuroxime Impurity 8(Cefuroxime Sodium EP Impurity H)(Cefuroxime Axetil EP Impurity E) (Z)-N-(1,7-dioxo-1,4,5a,6-tetrahydro-3H,7H-azeto[2,1-b]furo[3,4-d][1,3]thiazin-6-yl)-2-(furan-2-yl)-2-(methoxyimino)acetamide (αZ)-α-(MethoxyiMino)-N-[(5aR,6R)-1,4,5a,6-tetrahydro-1,7-dioxo-3H,7H-azeto[2,1-b]furo[3,4-d][1,3]thiazin-6-yl]-2-furanacetaMide (Z)-N-((5aR,6R)-1,7-dioxo-1,3,4,5a,6,7-hexahydroazeto[2,1-b]furo[3,4-d][1,3]thiazin-6-yl)-2-(furan-3-yl)-2-(methoxyimino)acetamide 2-Furanacetamide, α-(methoxyimino)-N-[(5aR,6R)-1,4,5a,6-tetrahydro-1,7-dioxo-3H,7H-azeto[2,1-b]furo[3,4-d][1,3]thiazin-6-yl]-, (αZ)- (Z)-N-((5aR,6R)-1,7-dioxo-1,4,5a,6-tetrahydro-3H,7H-azeto[2,1-b] furo[3,4-d][1,3]thiazin-6-yl)-2-(furan-2-yl)-2-(methoxyimino)acetamid (Z)-N-((5aR,6R)-1,7-dioxo-1,4,5a,6-tetrahydro-3H,7H-azeto[2,1-b]furo[3,4-d][1,3]thiazin-6-yl)-2-(furan-2-yl)-2-(methoxyimino)acetamide Cefuroxime Impurity 8/Cefuroxime EP Impurity H/(Z)-N-((5aR,6R)-1,7-dioxo-1,4,5a,6-tetrahydro-3H,7H-azeto[2,1-b]furo[3,4-d][1,3]thiazin-6-yl)-2-(furan-2-yl)-2-(methoxyimino)acetamide