InChI=1S/C21H20O13S/c22-7-14-17(26)21(34-35(29,30)31)19(28)20(33-14)16-11(25)6-13-15(18(16)27)10(24)5-12(32-13)8-1-3-9(23)4-2-8/h1-6,14,17,19-23,25-28H,7H2,(H,29,30,31)