methyl 3-{[2-(piperidin-1-yl)ethyl]amino}butanoate

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

methyl 2-methyl-3-[(3-methylbutan-2-yl)amino]propanoate

methyl 3-[(2,2-dimethoxyethyl)amino]butanoate

methyl 3-{[5-(diethylamino)pentan-2-yl]amino}-2-methylpropanoate

methyl 3-{[3-(dimethylamino)propyl]amino}-2-methylpropanoate

methyl 2-methyl-3-[(3-phenylpropyl)amino]propanoate

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

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

methyl 3-[(2,2-diethoxyethyl)amino]-2-methylpropanoate

ethyl 3-(4-methylpiperidin-1-yl)propanoate