InChI=1S/C20H20O14S/c21-9-3-1-8(5-14(9)34-35(29,30)31)2-4-10(22)15-11(23)6-12(24)19(17(15)27)33-20-18(28)16(26)13(25)7-32-20/h1-6,13,16,18,20-21,23-28H,7H2,(H,29,30,31)