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