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