InChI=1/C18H12N2O5/c21-16-13(8-11-6-7-14-15(9-11)25-10-24-14)17(22)20(18(23)19-16)12-4-2-1-3-5-12/h1-9H,10H2,(H,19,21,23)/p-1/b13-8-/fC18H11N2O5/q-1 1FB77EB66031C5AE