ethyl 3-[(2,2-dimethoxyethyl)amino]propanoate

tert-butyl 2-methyl-3-[(1-phenylethyl)amino]propanoate

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

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

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

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

methyl 2-methyl-3-[(1-phenylethyl)amino]propanoate

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

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

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

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