InChI=1S/C21H20O13S/c22-7-11-19(34-35(29,30)31)17(27)18(28)21(33-11)13-15(25)16(26)14(24)12-9(23)6-10(32-20(12)13)8-4-2-1-3-5-8/h1-6,11,17-19,21-22,24-28H,7H2,(H,29,30,31)