InChI=1S/C20H18N6O2/c1-26(28)17-8-6-16(7-9-17)24-20-23-12-10-18(25-20)14-2-4-15(5-3-14)19(27)22-13-11-21/h2-10,12,26H,13H2,1H3,(H,22,27)(H,23,24,25)