InChI=1S/C22H21FN2O/c23-20-8-5-17(6-9-20)19-11-16(12-24-14-19)13-25-15-21-10-7-18-3-1-2-4-22(18)26-21/h1-6,8-9,11-12,14,21,25H,7,10,13,15H2/t21-/m1/s1