InChI=1S/C20H19F3N2O3/c21-20(22,23)16-7-3-1-5-14(16)13-9-11-25(12-10-13)19(28)24-17-8-4-2-6-15(17)18(26)27/h1-8,13H,9-12H2,(H,24,28)(H,26,27)