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