tert-butyl 3-[(2-methylpropyl)amino]propanoate

tert-butyl 3-{[3-(morpholin-4-yl)propyl]amino}propanoate

tert-butyl 3-{[(4-fluorophenyl)methyl]amino}propanoate

tert-butyl 3-{[5-(diethylamino)pentan-2-yl]amino}propanoate

tert-butyl 3-{[(4-chlorophenyl)methyl]amino}propanoate

tert-butyl 3-{[(4-methylphenyl)methyl]amino}propanoate

tert-butyl 3-{[3-(dimethylamino)-2,2-dimethylpropyl]amino}propanoate

ethyl 3-(hexylamino)propanoate

Ethyl 3-(propylamino)propanoate

ethyl 3-(cyclopropylamino)propanoate

ethyl 3-{[(oxolan-2-yl)methyl]amino}propanoate