1-(tert-Butoxycarbonyl)-4-[(2-fluoro-5-methoxybenzyl)amino]piperidine3-({[1-(tert-Butoxycarbonyl)piperidin-4-yl]amino}methyl)-4-fluoroanisole4-[(2-Fluoro-5-methoxybenzyl)amino]piperidine, N1-BOC protectedtert-Butyl 4-[(2-fluoro-5-methoxybenzyl)amino]piperidine-1-carboxylate