InChI=1/C20H22F4N2O2/c1-13(2)19(14-7-9-16(21)10-8-14)26-12-18(27)25-11-15-5-3-4-6-17(15)28-20(22,23)24/h3-10,13,19,26H,11-12H2,1-2H3,(H,25,27)/t19-/m1/s1/f/h25H B23A50A4F66FE273