InChI=1/C42H32O9/c43-28-8-4-24(5-9-28)41-38(26-16-30(45)20-31(46)17-26)34-13-22(3-12-36(34)50-41)1-2-23-14-35(49)40-37(15-23)51-42(25-6-10-29(44)11-7-25)39(40)27-18-32(47)21-33(48)19-27/h1-21,38-39,41-49H/b2-1+/t38-,39?,41-,42?/s2