3-{[(tert-butoxy)carbonyl](cyclopropyl)amino}propanoic acid

3-{[(tert-butoxy)carbonyl][5-(diethylamino)pentan-2-yl]amino}propanoic acid

3-{[(tert-butoxy)carbonyl](prop-2-en-1-yl)amino}propanoic acid

3-{[(tert-butoxy)carbonyl](2-methylcyclohexyl)amino}propanoic acid

tert-butyl 3-[(2-methylpropyl)amino]propanoate

tert-butyl 3-(hexylamino)propanoate

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

tert-butyl 3-{[3-(dimethylamino)propyl]amino}propanoate

tert-butyl 3-{[2-(1H-indol-3-yl)ethyl]amino}propanoate

tert-butyl 3-(cycloheptylamino)propanoate

Ethyl 3-(propylamino)propanoate