methyl 2-methyl-3-[(2-methylpropyl)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

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

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

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

methyl 2-methyl-3-(octylamino)propanoate