Ceftizoxime Impurity 117

(R) -2- ((R) -1- ((Z) -2- (2-aminothiazol-4-yl) -2- (methoxyimino) acetamido) -2- ((4- ((Z) -2- (((R) -carboxy ((R) -4-carboxy-3,6-dihydro-2H-1,3-thiazin-2-yl) methyl) amino) -1- (methoxyimino) -2-oxoethyl) thiazol-2-yl) amino) -2-oxoethyl) -3,6-dihydro-2H-1,3-thiazine-4-carboxylic acid