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

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

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

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

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

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

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

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

tert-butyl 3-[(2,2-diethoxyethyl)amino]-2-methylpropanoate

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

methyl 3-[(3-butoxypropyl)amino]-2-methylpropanoate