InChI=1S/C19H16O8S/c1-19(10-25-28(22,23)24)5-4-14-15(7-13(21)9-18(14)27-19)17-6-11-2-3-12(20)8-16(11)26-17/h2-9,20-21H,10H2,1H3,(H,22,23,24)