InChI=1/C16H12N2O4/c1-10-7-8-12(22-10)9-13-14(19)17-16(21)18(15(13)20)11-5-3-2-4-6-11/h2-9H,1H3,(H,17,19,21)/p-1/b13-9-/fC16H11N2O4/q-1 851E287DA1991062