InChI=1S/C20H16N8O/c1-13(29)23-16-8-5-9-17(10-16)24-19-26-18-14(11-21)12-22-28(18)20(27-19)25-15-6-3-2-4-7-15/h2-10,12H,1H3,(H,23,29)(H2,24,25,26,27)