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

ethyl 3-{[3-(dimethylamino)-2,2-dimethylpropyl]amino}propanoate

ethyl 3-{[3-(propan-2-yloxy)propyl]amino}propanoate

tert-butyl 3-[(butan-2-yl)amino]-2-methylpropanoate

tert-butyl 2-methyl-3-{[2-(pyrrolidin-1-yl)ethyl]amino}propanoate

tert-butyl 2-methyl-3-{[(pyridin-4-yl)methyl]amino}propanoate

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

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

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

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

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