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

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

tert-butyl 2-methyl-3-{[3-(propan-2-yloxy)propyl]amino}propanoate

methyl 3-(cyclohexylamino)-2-methylpropanoate

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

methyl 3-(hexylamino)-2-methylpropanoate

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

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

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

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

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