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