InChI=1S/C42H32O9/c43-27-9-2-22(3-10-27)1-4-25-15-32(48)20-35-37(25)40(42(50-35)24-7-13-29(45)14-8-24)34-19-33(49)21-36-39(34)38(26-16-30(46)18-31(47)17-26)41(51-36)23-5-11-28(44)12-6-23/h1-21,38,40-49H/b4-1+/t38?,40-,41?,42+/m0/s1