InChI=1S/C20H22O10S/c1-10(9-30-31(27,28)29)3-5-14-16(23)8-17(24)18(20(14)26)19(25)11(2)13-6-4-12(21)7-15(13)22/h3-4,6-8,11,21-24,26H,5,9H2,1-2H3,(H,27,28,29)