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