InChI=1S/C8H5N13O6/c9-5-13-7(20(24)25)15-17(5)3-2(19(22)23)4(12-1-11-3)18-6(10)14-8(16-18)21(26)27/h1H,(H2,9,13,15)(H2,10,14,16)