InChI=1S/C31H28O17S/c1-44-29-23(12-45-24(38)7-3-13-2-5-15(32)17(34)8-13)47-30(28(40)31(29)48-49(41,42)43)26-20(37)11-22-25(27(26)39)19(36)10-21(46-22)14-4-6-16(33)18(35)9-14/h2-11,23,28-35,37,39-40H,12H2,1H3,(H,41,42,43)/b7-3+