InChI=1/C12H8N4O4/c17-11-12(18)14-8-6-10(16(19)20)9(5-7(8)13-11)15-3-1-2-4-15/h1-6H,(H,13,17)(H,14,18)/p-1/fC12H7N4O4/h13H/q-1 06ED7209BC5147C8