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

methyl 2-methyl-3-[(pentan-2-yl)amino]propanoate

methyl 3-[(butan-2-yl)amino]-2-methylpropanoate

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

methyl 3-(hexylamino)butanoate

methyl 2-methyl-3-[(3-methylbutyl)amino]propanoate

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

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

methyl 2-methyl-3-[(prop-2-en-1-yl)amino]propanoate

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

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