InChI: | InChI=1/C42H32N4O4/c1-49-33-19-13-29(14-20-33)41(47)43-31-17-23-37-35(25-31)39(27-9-5-3-6-10-27)46-38-24-18-32(44-42(48)30-15-21-34(50-2)22-16-30)26-36(38)40(45-37)28-11-7-4-8-12-28/h3-26H,1-2H3,(H,43,47)(H,44,48)/b39-35-,40-36-,45-37-,45-40-,46-38-,46-39- |