InChI=1S/C20H26O9S/c1-6-10(2)19(22)27-16-7-11(3)14(21)9-15(29-30(24,25)26)12(4)8-17-18(16)13(5)20(23)28-17/h6,8,14-18,21H,3,5,7,9H2,1-2,4H3,(H,24,25,26)/b10-6-,12-8+