InChI=1S/C19H16O11S/c1-25-7-4-3-5-8-11(7)15(20)13-9(26-2)6-10-12(16(13)27-8)14-17(30-31(22,23)24)18(21)29-19(14)28-10/h3-6,14,17-19,21H,1-2H3,(H,22,23,24)