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

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

ethyl 3-{[3-(diethylamino)propyl]amino}propanoate

ethyl 3-(cyclooctylamino)propanoate

tert-butyl 3-[(2-ethoxyethyl)amino]-2-methylpropanoate

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

tert-butyl 2-methyl-3-[(1-phenylethyl)amino]propanoate

tert-butyl 3-{[(2H-1,3-benzodioxol-5-yl)methyl]amino}-2-methylpropanoate

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

tert-butyl 2-methyl-3-[(4-phenylbutan-2-yl)amino]propanoate

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