Ceftaroline Fosamil Impurity 17

(R) -2- ((8R,16S, Z) -16-amino-16-carboxy-11-imino-6,9-dioxo-5- (5- (phosphonoamino) -1,2,4-thiadiazol-3-yl) -3-oxa-4,7,10,12-tetraazahexadec-4-en-8-yl) -5- ((4- (1-methylpyridin-1-ium-4-yl) thiazol-2-yl) thio) -3,6-dihydro-2H-1,3-thiazine-4-carboxylate