InChI=1S/C18H26O9S/c1-11-5-4-7-12(19)6-2-3-8-16(27-28(23,24)25)14-9-13(20)10-15(21)17(14)18(22)26-11/h9-12,16,19-21H,2-8H2,1H3,(H,23,24,25)