3-{[(tert-butoxy)carbonyl][(pyridin-4-yl)methyl]amino}propanoic acid

3-{[(tert-butoxy)carbonyl][2-(4-methoxyphenyl)ethyl]amino}propanoic acid

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

tert-butyl 3-[(pentan-2-yl)amino]propanoate

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

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

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

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

tert-butyl 3-[(3-methoxypropyl)amino]propanoate

tert-butyl 3-[(3-ethoxypropyl)amino]propanoate

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