InChI=1S/C21H20O13S/c22-7-14-17(26)18(27)19(28)21(33-14)16-11(24)5-10(23)15-12(25)6-13(32-20(15)16)8-2-1-3-9(4-8)34-35(29,30)31/h1-6,14,17-19,21-24,26-28H,7H2,(H,29,30,31)