InChI=1S/C21H21F3N2S/c22-21(23,24)15-7-8-20-18(14-15)16(17-4-1-2-6-19(17)27-20)5-3-11-26-12-9-25-10-13-26/h1-2,4-8,14,25H,3,9-13H2/b16-5-