InChI=1S/C30H26O16S/c31-13-24-27(37)29(45-25(36)8-2-14-1-7-18(33)22(9-14)46-47(39,40)41)28(38)30(44-24)42-17-10-19(34)26-20(35)12-21(43-23(26)11-17)15-3-5-16(32)6-4-15/h1-12,24,27-34,37-38H,13H2,(H,39,40,41)/b8-2+