Cefiderocol Impurity 7

4-methoxybenzyl (5R,6R,7R) -7- ((Z) -2- (((1- (tert-butoxy) -2-methyl-1-oxopropan-2-yl) oxy) imino) -2- (2- ((Z) -2- (((1- (tert-butoxy) -2-methyl-1-oxopropan-2-yl) oxy) imino) -2- (2- ((tert-butoxycarbonyl) amino) thiazol-4-yl) acetamido) thiazol-4-yl) acetamido) -3- (chloromethyl) -8-oxo-5-thia-1-azabicyclo[4.2.0]oct-2-ene-2-carboxylate 5-oxide