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

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

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

ethyl 3-(butylamino)propanoate

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

ethyl 3-{[(4-fluorophenyl)methyl]amino}propanoate

ethyl 3-(pentylamino)propanoate

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

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

ethyl 3-(octylamino)propanoate

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