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