(6R,7R)-7-((E)-2-(5-Acetamido-1,2,4-thiadiazol-3-yl)-2-(ethoxyimino)acetamido)-3-((4-(1-methylpyridin-1-ium-4-yl)thiazol-2-yl)thio)-8-oxo-5-thia-1-azabicyclo[4.2.0]oct-2-ene-2-carboxylate is an impurity of Ceftaroline Fosamil (C243970), a cephalosporin antibiotic. It is active against methicillin-resistant Staphylococcus aureus (MRSA) and Gram-positive bacteria.
