InChI=1S/C22H20O12S/c1-9(2)5-14(25)15-10(3)18-21(17(26)20(15)31-4)34-22(27)16-11(8-32-35(28,29)30)6-13(24)12(7-23)19(16)33-18/h5-7,24,26H,8H2,1-4H3,(H,28,29,30)