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