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

tert-butyl 3-[(2,2-dimethoxyethyl)amino]-2-methylpropanoate

tert-butyl 2-methyl-3-[(4-phenylbutan-2-yl)amino]propanoate

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

tert-butyl 3-{[2-(4-fluorophenyl)ethyl]amino}-2-methylpropanoate

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