1-(4-Fluoro-2-methylbenzyl)piperidin-4-amine dihydrochloride

tert-Butyl 1-(methylcarbamoyl)piperidin-4-ylcarbamate

tert-Butyl 1-(dimethylcarbamoyl)piperidin-4-ylcarbamate

tert-Butyl 1-(2-methoxyethyl)piperidin-4-ylcarbamate

tert-Butyl 1-(methylsulfonyl)piperidin-4-ylcarbamate

tert-Butyl 4-(4-cyanobenzenesulfonylamino)piperidine-1-carboxylate

4-Amino-N,N-diethylpiperidine-1-carboxamide hydrochloride

tert-Butyl 1-(pyrrolidine-1-carbonyl)piperidin-4-ylcarbamate

tert-Butyl 1-(morpholine-4-carbonyl)piperidin-4-ylcarbamate

tert-Butyl 4-[3-(4-cyanophenyl)ureido]piperidine-1-carboxylate

tert-Butyl 4-[3-(3-cyanophenyl)ureido]piperidine-1-carboxylate