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