tert-butyl 2-methyl-3-{[2-(morpholin-4-yl)ethyl]amino}propanoate

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

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

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

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

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

methyl 3-(butylamino)butanoate

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

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

methyl 3-[(2,2-dimethoxyethyl)amino]-2-methylpropanoate

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

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

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

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

methyl 3-[(2,2-diethoxyethyl)amino]-2-methylpropanoate