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