InChI=1S/C21H20N4O/c1-14-3-2-4-17(11-14)20(26)18-9-10-24-19(12-18)25-13-15-5-7-16(8-6-15)21(22)23/h2-12H,13H2,1H3,(H3,22,23)(H,24,25)