InChI=1S/C19H16O9S/c1-10(20)18(28-29(24,25)26)14(11-6-3-2-4-7-11)16-17(22)15-12(21)8-5-9-13(15)27-19(16)23/h2-9,14,18,21,23H,1H3,(H,24,25,26)