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