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