InChI=1S/C42H30O13S/c43-21-6-1-18(2-7-21)40-37-26-12-23(45)15-31-34(26)38(41(52-31)19-3-8-22(44)9-4-19)27-13-24(46)17-33-36(27)39(28-14-25(47)16-32(53-40)35(28)37)42(54-33)20-5-10-29(48)30(11-20)55-56(49,50)51/h1-17,37-48H,(H,49,50,51)