Ceftaroline fosamil is a cephalosporin having [4-(1-methylpyridinium-4-yl)-1,3-thiazol-2-yl]sulfanyl and {(2Z)-2-(ethoxyimino)-2-[5-(phosphonoamino)-1,2,4-thiadiazol-3-yl]acetyl}amino side groups located at positions 3 and 7 respectively. The N-phospho prodrug of ceftaroline, a broad-spectrum antibiotic active against methicillin-resistant Staphylococcus aureus (MRSA). It is used for the treatment of adults with acute bacterial skin and skin structure infections. It has a role as an antibacterial drug, an antimicrobial agent and a prodrug. It is an iminium betaine, a cephalosporin, a member of 1,3-thiazoles, an oxime O-ether, a member of thiadiazoles and an organic phosphoramidate. It is functionally related to a ceftaroline.