InChI=1S/C29H20O12S/c30-16-6-1-14(2-7-16)3-10-19-24-23(13-21(33)26(19)34)40-28(35)29(24)25-20(32)11-17(31)12-22(25)39-27(29)15-4-8-18(9-5-15)41-42(36,37)38/h1-13,27,30-34H,(H,36,37,38)/b10-3+