InChI=1/C20H16F2N2O4/c1-27-15-4-3-5-16(28-2)17(15)19-18(23)13(8-9-24(19)26)20(25)12-7-6-11(21)10-14(12)22/h3-10H,23H2,1-2H3 43B524572F8C3050