Cefixime Impurity 70

2- ((((Z) -1- (2-aminothiazol-4-yl) -2- ((((2R,5R) -5-methyl-7-oxo-1,2,5,7-tetrahydro-4H-furo[3,4-d][1,3]thiazin-2-yl) methyl) amino) -2-oxoethylidene) amino) oxy) acetic acid