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