InChI=1S/C21H24O9S/c1-20(2,12-28-31(23,24)25)7-8-21(3)17(30-21)11-27-19-13-4-5-18(22)29-16(13)10-15-14(19)6-9-26-15/h4-6,9-10,17H,7-8,11-12H2,1-3H3,(H,23,24,25)