InChI=1/C12H8N2O4/c15-10-9(11(16)14-12(17)13-10)7-5-18-8-4-2-1-3-6(7)8/h1-5H,(H3,13,14,15,16,17)/p-1/fC12H7N2O4/h13-14H/q-1 4DB4A9A77DC5C6F7