InChI=1S/C21H24O9S/c1-28-20-15-11-13(19(24)21(20)29-2)4-3-5-18(30-31(25,26)27)17(23)9-7-12-6-8-16(22)14(15)10-12/h6,8,10-11,18,22,24H,3-5,7,9H2,1-2H3,(H,25,26,27)