InChI=1/C16H14N2O6/c1-10(16(20)21)24-13-5-2-11(3-6-13)9-17-14-8-12(18(22)23)4-7-15(14)19/h2-10,19H,1H3,(H,20,21)/p-1/t10-/m1/s1/fC16H13N2O6/q-1 A8AA20A9480BD4EB