InChI=1S/C20H18N4O2/c25-15-2-3-16(14(11-15)12-20-23-7-8-24-20)17-9-13(1-4-18(17)26)10-19-21-5-6-22-19/h1-9,11,25-26H,10,12H2,(H,21,22)(H,23,24)