InChI=1S/C21H18N4O2/c22-21(27)24-11-13-3-1-4-14(9-13)16-5-2-6-17(20(16)26)19-10-15-12-23-8-7-18(15)25-19/h1-10,12,25-26H,11H2,(H3,22,24,27)