tert-butyl 3-(cyclohexylamino)propanoate

tert-butyl 3-[(2,2-dimethoxyethyl)amino]propanoate

tert-butyl 3-{[3-(1H-imidazol-1-yl)propyl]amino}propanoate

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

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

ethyl 3-[(1-phenylethyl)amino]propanoate

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

ethyl 3-[(diphenylmethyl)amino]propanoate

ethyl 3-(octylamino)propanoate

tert-butyl 3-{[(furan-2-yl)methyl]amino}-2-methylpropanoate

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