InChI=1S/C21H26O9S/c1-28-20-15-11-16(19(24)21(20)29-2)17(22)5-3-4-13(30-31(25,26)27)8-6-12-7-9-18(23)14(15)10-12/h7,9-11,13,17,22-24H,3-6,8H2,1-2H3,(H,25,26,27)