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