InChI=1S/C21H24O9S/c1-28-16-5-3-4-14(12-16)6-9-17(22)21(24)18(23)10-7-15-8-11-19(20(13-15)29-2)30-31(25,26)27/h3-5,8,11-13,21,24H,6-7,9-10H2,1-2H3,(H,25,26,27)