InChI=1S/C19H16O11/c20-6-3-9-12(10(21)4-6)8-2-1-7(5-11(8)29-18(9)27)28-19-15(24)13(22)14(23)16(30-19)17(25)26/h1-5,13-16,19-24H,(H,25,26)