InChI=1S/C31H34Br2N4O4/c1-3-41-27-20-25(40-2)12-13-26(27)30-34-28(21-4-8-23(32)9-5-21)29(22-6-10-24(33)11-7-22)37(30)31(39)36-16-14-35(15-17-36)18-19-38/h4-13,20,28-29,38H,3,14-19H2,1-2H3/t28-,29+/m0/s1