InChI=1/C16H12N4O4/c17-14(10-5-7-18-8-6-10)19-24-13(21)9-20-15(22)11-3-1-2-4-12(11)16(20)23/h1-8H,9H2,(H2,17,19)/p+1/fC16H13N4O4/h18H,17H2/q+1/b19-14- 99075D44E2390F0A