Ceftazidime Dimer Impurity 101

(6R,7R) -7- ((Z) -2- (2- (2- ((((Z) -1- (2-aminothiazol-4-yl) -2- (((6R,7R) -2-carboxylato-8-oxo-3- (pyridin-1-ium-1-ylmethyl) -5-thia-1-azabicyclo[4.2.0]oct-3-en-7-yl) amino) -2-oxoethylidene) amino) oxy) -2-methylpropanamido) thiazol-4-yl) -2- (((2-carboxypropan-2-yl) oxy) imino) acetamido) -8-oxo-3- (pyridin-1-ium-1-ylmethyl) -5-thia-1-azabicyclo[4.2.0]oct-2-ene-2-carboxylate