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