InChI=1/C20H16N2O4/c23-19-17-11-5-6-12(8-7-11)18(17)20(24)21(19)15-9-10-16(22(25)26)14-4-2-1-3-13(14)15/h1-6,9-12,17-18H,7-8H2/t11-,12+,17+,18-	F4A5FDFE3573D8DB