InChI=1S/C20H22O10S/c1-9(2)4-5-12-14(22)8-15(23)16(18(12)25)17(24)10(3)11-6-7-13(21)20(19(11)26)30-31(27,28)29/h4,6-8,10,21-23,25-26H,5H2,1-3H3,(H,27,28,29)