3-{[(tert-butoxy)carbonyl][(2-chlorophenyl)methyl]amino}propanoic acid

tert-butyl 3-{[2-(3,4-dimethoxyphenyl)ethyl]amino}propanoate

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

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

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

tert-butyl 3-{[2-(diethylamino)ethyl]amino}propanoate

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

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

tert-butyl 3-(cyclopentylamino)propanoate

ethyl 3-[(2-ethoxyethyl)amino]propanoate

ethyl 3-[(2-phenylethyl)amino]propanoate