3-{[(tert-butoxy)carbonyl](butyl)amino}propanoic acid

3-{[(tert-butoxy)carbonyl][2-(4-fluorophenyl)ethyl]amino}propanoic acid

tert-butyl 3-[(propan-2-yl)amino]propanoate

tert-butyl 3-[(3-butoxypropyl)amino]propanoate

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

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

tert-butyl 3-[(1-phenylethyl)amino]propanoate

tert-Butyl 3-(ethylamino)propanoate

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

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

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