InChI=1S/C22H21BrN4O/c1-14-21-10-16(4-7-22(21)27-26-14)17-9-20(12-25-11-17)28-13-19(24)8-15-2-5-18(23)6-3-15/h2-7,9-12,19H,8,13,24H2,1H3,(H,26,27)/t19-/m0/s1