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

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

methyl 3-{[3-(morpholin-4-yl)propyl]amino}butanoate

methyl 2-methyl-3-(pentylamino)propanoate

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

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