InChI=1S/C21H24Br2N4O2/c1-5-12(4)18-19(28)27-21(26-18,11(2)3)20(29)24-7-6-13-10-25-17-9-16(23)15(22)8-14(13)17/h6-12,25H,5H2,1-4H3,(H,24,29)(H,27,28)/b7-6-/t12-,21-/m1/s1