InChI=1S/C21H22N4O2/c1-21(2,12-26)24-20(27)14-6-7-18-15(9-14)16(11-25(18)3)17-10-13-5-4-8-22-19(13)23-17/h4-11,26H,12H2,1-3H3,(H,22,23)(H,24,27)