ethyl 3-(pentylamino)propanoate

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

tert-butyl 2-methyl-3-(octylamino)propanoate

methyl 3-[(3-butoxypropyl)amino]-2-methylpropanoate

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

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

methyl 3-[(2-methoxyethyl)amino]butanoate

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

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

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

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