tert-butyl 3-{[3-(dimethylamino)-2,2-dimethylpropyl]amino}propanoate

tert-butyl 2-methyl-3-[(2-phenylethyl)amino]propanoate

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

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

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

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

methyl 3-{[(furan-2-yl)methyl]amino}-2-methylpropanoate

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

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

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

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