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