InChI=1S/C20H24O9S/c1-13(2)17(21)6-4-14(12-28-30(23,24)25)8-9-27-18-10-15(26-3)11-19-16(18)5-7-20(22)29-19/h5,7-8,10-11,17,21H,1,4,6,9,12H2,2-3H3,(H,23,24,25)/b14-8-