InChI=1S/C21H24O9S/c1-28-19-10-15(9-18(24)13-19)4-7-17(23)12-16(22)6-3-14-5-8-20(21(11-14)29-2)30-31(25,26)27/h5,8-11,13,24H,3-4,6-7,12H2,1-2H3,(H,25,26,27)