InChI=1/C20H20F2N2O/c1-20(2,3)19(25)24-18(13-7-5-4-6-8-13)12-17(23-24)15-11-14(21)9-10-16(15)22/h4-11,18H,12H2,1-3H3/t18-/m1/s1 5D38D88753F9E7D7