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