InChI=1S/C21H18O13S/c1-7-17(26)19(28)21(34-35(29,30)31)20(32-7)16-12(25)6-14-15(18(16)27)11(24)5-13(33-14)8-2-3-9(22)10(23)4-8/h2-7,19-23,25,27-28H,1H3,(H,29,30,31)