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

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

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

ethyl 3-{[3-(diethylamino)propyl]amino}propanoate

ethyl 3-(cyclooctylamino)propanoate