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