InChI=1S/C19H16O10/c20-10-6-11-9(7-3-1-2-4-8(7)18(26)27-11)5-12(10)28-19-15(23)13(21)14(22)16(29-19)17(24)25/h1-6,13-16,19-23H,(H,24,25)