3-{[(tert-butoxy)carbonyl](3-phenylpropyl)amino}propanoic acid

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

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

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

ethyl 3-[(prop-2-en-1-yl)amino]propanoate

ethyl 3-[(diphenylmethyl)amino]propanoate

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

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

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

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

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