InChI=1S/C20H22O9S/c1-28-19-10-13(4-8-17(19)23)2-6-15(21)12-16(22)7-3-14-5-9-18(24)20(11-14)29-30(25,26)27/h4-5,8-11,23-24H,2-3,6-7,12H2,1H3,(H,25,26,27)