Ceftriaxone Impurity 71

(6R,7R) -7- ((Z) -2- (2-aminothiazol-4-yl) -2- (methoxyimino) acetamido) -3- (((4- ((E) -2- (((6R,7R) -2-carboxy-3- (((2-methyl-5,6-dioxo-1,2,5,6-tetrahydro-1,2,4-triazin-3-yl) thio) methyl) -8-oxo-5-thia-1-azabicyclo[4.2.0]oct-2-en-7-yl) amino) -1- (methoxyimino) -2-oxoethyl) thiazol-2-yl) amino) methyl) -8-oxo-5-thia-1-azabicyclo[4.2.0]oct-2-ene-2-carboxylic acid