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

tert-butyl 3-{[3-(1H-imidazol-1-yl)propyl]amino}propanoate

tert-butyl 3-{[(thiophen-2-yl)methyl]amino}propanoate

tert-butyl 3-{[2-(1H-indol-3-yl)ethyl]amino}propanoate

tert-butyl 3-(octylamino)propanoate

ethyl 3-[(butan-2-yl)amino]propanoate

ethyl 3-{[2-(morpholin-4-yl)ethyl]amino}propanoate

ethyl 3-[(3-methylbutyl)amino]propanoate

ethyl 3-{[2-(4-methoxyphenyl)ethyl]amino}propanoate

ethyl 3-{[(4-methoxyphenyl)methyl]amino}propanoate

ethyl 3-{[2-(4-fluorophenyl)ethyl]amino}propanoate