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