| Synonyms: | Cefmetazole Impurity 3;Cefmetazole Lactone (~90%);(5aR-cis)-2-[(Cyanomethyl)thio]-N-(1,4,5a,6-tetrahydro-6-methoxy-1,7-dioxo-3H,7H-azeto[2,1-b]furo[3,4-d][1,3]thiazin-6-yl)-acetamide;Cefmetazole Related Compound inner ester;Cefmetazole inner ester;Cefmezole sodium decomposition;2-((cyanomethyl)thio);Cefmetazole impurity 4/Cefmetazole Lactone/2-((cyanomethyl)thio)-N-((5aR,6S)-6-methoxy-1,7-dioxo-1,4,5a,6-tetrahydro-3H,7H-azeto[2,1-b]furo[3,4-d][1,3]thiazin-6-yl)acetamide |