ethyl 3-[(1-phenylethyl)amino]propanoate

tert-butyl 3-(tert-butylamino)propanoate

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

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

tert-butyl 3-{[5-(diethylamino)pentan-2-yl]amino}-2-methylpropanoate

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

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

methyl 3-(cyclohexylamino)-2-methylpropanoate

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

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

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