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