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

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

tert-butyl 3-{[(4-chlorophenyl)methyl]amino}propanoate

ethyl 3-[(pentan-3-yl)amino]propanoate

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

ethyl 3-[(2,2-dimethoxyethyl)amino]propanoate

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

ethyl 3-{[2-(4-fluorophenyl)ethyl]amino}propanoate

tert-butyl 3-(tert-butylamino)propanoate

tert-butyl 3-(butylamino)-2-methylpropanoate

tert-butyl 2-methyl-3-(pentylamino)propanoate