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

methyl 3-{[2-(diethylamino)ethyl]amino}butanoate

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

methyl 3-{[2-(4-methoxyphenyl)ethyl]amino}butanoate

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

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

methyl 3-{[(4-chlorophenyl)methyl]amino}-2-methylpropanoate

methyl 3-{[3-(propan-2-yloxy)propyl]amino}butanoate

methyl 3-{[3-(diethylamino)propyl]amino}butanoate

ethyl 3-[butyl(methyl)amino]propanoate

ethyl 3-(dibutylamino)propanoate