InChI=1S/C20H20O10S/c1-7(6-29-31(26,27)28)10-14(21)11-13(17(24)15(10)22)20(3)5-4-9-8(2)19(25)30-18(12(9)20)16(11)23/h7,21-22,24H,4-6H2,1-3H3,(H,26,27,28)