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