tert-butyl 3-{[(2-methoxyphenyl)methyl]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

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

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

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

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

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