1-[3-(3-methoxyphenyl)-1,2,4-thiadiazol-5-yl]piperazine

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

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

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

3-{[(tert-butoxy)carbonyl][(thiophen-2-yl)methyl]amino}propanoic acid

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

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

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

tert-butyl 3-(pentylamino)propanoate

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

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