InChI=1S/C21H24O9S/c1-5-7-13(22)17-18(24)16-12(14(6-2)30-31(25,26)27)10-15(23)28-19(16)11-8-9-21(3,4)29-20(11)17/h8-10,14,24H,5-7H2,1-4H3,(H,25,26,27)