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

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

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

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

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

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

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

methyl 3-(butylamino)butanoate

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