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