InChI=1/C21H20N4O/c1-3-15-19-16(8-5-11-23-19)21(26)25(2)18-10-9-17(24-20(15)18)13-6-4-7-14(22)12-13/h4-12,15H,3,22H2,1-2H3/t15-/m1/s1 85788D4B9BA98A96