InChI=1S/C20H24O9S/c1-10-11(2)20(13-8-16(26-3)18(22)17(9-13)27-4)28-19(10)12-5-6-14(21)15(7-12)29-30(23,24)25/h5-11,19-22H,1-4H3,(H,23,24,25)