InChI=1S/C21H16N4O2/c1-27-19-11-13(7-9-18(19)26)12-6-8-14-17(10-12)24-25-20(14)21-22-15-4-2-3-5-16(15)23-21/h2-11,26H,1H3,(H,22,23)(H,24,25)