InChI=1S/C18H26O9S/c1-11-6-5-9-13(27-28(23,24)25)8-4-2-3-7-12-10-14(19)16(20)17(21)15(12)18(22)26-11/h10-11,13,19-21H,2-9H2,1H3,(H,23,24,25)