4-({[1-(tert-Butoxycarbonyl)piperidin-4-yl]amino}methyl)-2-fluorobenzotrifluoride1-(tert-Butoxycarbonyl)-4-{[3-fluoro-4-(trifluoromethyl)benzyl]amino}piperidinetert-Butyl 4-{[3-fluoro-4-(trifluoromethyl)benzyl]amino}piperidine-1-carboxylate4-{[3-Fluoro-4-(trifluoromethyl)benzyl]amino}piperidine, N1-BOC protected