InChI=1S/C25H30O9S/c1-15(2)4-7-19-10-17(6-9-24(19)34-35(31,32)33)11-23(29)25(30)20-12-18(8-5-16(3)14-26)21(27)13-22(20)28/h4-6,9-10,12-13,23,26-29H,7-8,11,14H2,1-3H3,(H,31,32,33)/b16-5+