InChI=1S/C19H16O13/c20-7-1-4-5-2-9(22)15(13(26)14(5)30-18(29)6(4)3-8(7)21)31-19-12(25)10(23)11(24)16(32-19)17(27)28/h1-3,10-12,16,19-26H,(H,27,28)