3-((tert-butoxycarbonyl)(4-phenylbutan-2-yl)amino)propanoic acid

3-{[(tert-butoxy)carbonyl](2,2-diethoxyethyl)amino}propanoic acid

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

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

tert-butyl 3-{[3-(morpholin-4-yl)propyl]amino}propanoate

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

tert-butyl 3-(methylamino)propanoate

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

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

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

ethyl 3-[(4-phenylbutan-2-yl)amino]propanoate