InChI=1S/C33H30N4O4/c1-6-18-15(3)23-11-24-16(4)20(8-9-30(40)41)32(36-24)21-10-29(39)31-17(5)25(37-33(21)31)12-27-19(7-2)22(14-38)28(35-27)13-26(18)34-23/h6,11-14,20,34,37H,1,4,7-10H2,2-3,5H3,(H,40,41)/b23-11-,24-11+,25-12-,26-13-,27-12-,28-13-,32-21+