tert-butyl 3-{[2-(pyrrolidin-1-yl)ethyl]amino}propanoate

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

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

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

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

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

tert-butyl 3-(cycloheptylamino)propanoate

ethyl 3-{[2-(piperidin-1-yl)ethyl]amino}propanoate

ethyl 3-(cyclopropylamino)propanoate

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

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

ethyl 3-(cycloheptylamino)propanoate

ethyl 3-{[3-(propan-2-yloxy)propyl]amino}propanoate

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

tert-butyl 2-methyl-3-{[3-(morpholin-4-yl)propyl]amino}propanoate