InChI=1S/C20H18O14S/c21-8-4-11(24)14-13(5-8)32-17(7-1-2-9(22)10(23)3-7)18(16(14)27)33-20-19(34-35(28,29)30)15(26)12(25)6-31-20/h1-5,12,15,19-26H,6H2,(H,28,29,30)