InChI=1S/C21H20N4O3/c26-20(27)16-3-1-15(2-4-16)19-9-10-22-21(24-19)23-17-5-7-18(8-6-17)25-11-13-28-14-12-25/h1-10H,11-14H2,(H,26,27)(H,22,23,24)