3-{[(tert-butoxy)carbonyl][5-(diethylamino)pentan-2-yl]amino}propanoic acid

tert-butyl 3-(cyclopropylamino)propanoate

tert-butyl 3-(hexylamino)propanoate

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

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

tert-butyl 3-[(prop-2-en-1-yl)amino]propanoate

tert-butyl 3-(methylamino)propanoate

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

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

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

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