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