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

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

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

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

methyl 3-[(3-butoxypropyl)amino]butanoate

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

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

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

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

methyl 2-methyl-3-{[(4-methylphenyl)methyl]amino}propanoate

methyl 3-(methylamino)butanoate