InChI=1S/C20H20O14S/c21-9-3-1-8(5-11(9)23)2-4-10(22)15-12(24)6-13(25)18(16(15)27)33-20-17(28)19(14(26)7-32-20)34-35(29,30)31/h1-6,14,17,19-21,23-28H,7H2,(H,29,30,31)