InChI=1S/C20H24O8S/c1-10-11(2)20(22)14-9-17(26-3)15(21)8-13(14)19(10)12-5-6-16(18(7-12)27-4)28-29(23,24)25/h5-11,19-22H,1-4H3,(H,23,24,25)