(2S)-2-{[(tert-butoxy)carbonyl]amino}butanoic acid

(2S)-2-{[(tert-butoxy)carbonyl]amino}hept-5-ynoic acid

(2S)-2-{[(tert-butoxy)carbonyl]amino}hept-6-ynoic acid

(2S)-2-{[(tert-butoxy)carbonyl]amino}hex-5-enoic acid

(2S)-2-{[(tert-butoxy)carbonyl]amino}hex-5-ynoic acid

(2S)-2-{[(tert-butoxy)carbonyl]amino}hexanoic acid

(2S)-2-{[(tert-butoxy)carbonyl]amino}pent-4-enoic acid

(2S)-2-{[(tert-butoxy)carbonyl]amino}pent-4-ynoic acid

(2S)-2-{[(tert-butoxy)carbonyl]amino}pentanedioic acid

(2S)-2-{[(tert-butoxy)carbonyl]amino}pentanoic acid

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

(2S)-2-{[(tert-butyldimethylsilyl)oxy]methyl}pyrrolidine

(2S)-2-{[1,2,4]triazolo[4,3-a]pyridin-3-yl}pyrrolidine

(2S)-2-{[1,2,4]triazolo[4,3-a]pyridin-3-yl}pyrrolidine dihydrochloride

(2S)-2-{[1-(2-fluorophenyl)ethyl]amino}-3-methylbutan-1-ol hydrochloride

(2S)-2-{[1-(4-chlorophenyl)ethyl]amino}-3-methylbutan-1-ol hydrochloride

(2S)-2-{[1-(5-fluoropyridin-3-yl)ethyl]amino}-3-methylbutan-1-ol hydrochloride

(2S)-2-{[1-(benzenesulfonyl)piperidin-4-yl]formamido}-N-[(2-methoxyphenyl)methyl]propanamide

(2S)-2-{[4-(2-{2-amino-4-oxo-1H,4H,5H,6H,7H,8H-pyrido[2,3-d]pyrimidin-6-yl}ethyl)phenyl]formamido}pentanedioic acid

(2S)-3,3,3-trifluoro-2-hydroxy-2-methylpropanoic acid

(2S)-3,3,3-trifluoro-2-hydroxypropanoic acid

(2S)-3,3,3-trifluoro-2-methylpropane-1,2-diamine dihydrochloride

(2S)-3,3,3-trifluoropropane-1,2-diamine dihydrochloride

(2S)-3,3,3-trifluoropropane-1,2-diol

(2S)-3,3-difluoro-2-hydroxypropanoic acid

(2S)-3,3-difluoro-2-methoxypropanoic acid

(2S)-3,3-difluorobutan-2-amine hydrochloride

(2S)-3,3-difluoropropane-1,2-diol

(2S)-3,3-dimethyl-2-(methylamino)butan-1-ol

(2S)-3,3-dimethyl-2-(methylamino)butan-1-ol hydrochloride

(2S)-3,3-dimethyl-2-({[(1R,2R)-2-(2-methyl-5-phenyl-1H-pyrrol-1-yl)cyclohexyl]carbamothioyl}amino)-N,N-bis(2-methylpropyl)butanamide

(2S)-3,3-dimethyl-4-oxooxetane-2-carboxylic acid

(2S)-3,3-dimethylbutan-2-amine hydrochloride

(2S)-3,3-dimethylbutane-1,2-diol

(2S)-3,4-dihydro-2H-1-benzopyran-2-carboxylic acid

(2S)-3,6-diethoxy-2-(propan-2-yl)-2,5-dihydropyrazine

(2S)-3-(1,3-dioxolan-2-yl)-2-({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)propanoic acid

(2S)-3-(1-benzothiophen-3-yl)-2-({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)propanoic acid

(2S)-3-(1-benzyl-1H-imidazol-4-yl)-2-{[(tert-butoxy)carbonyl]amino}propanoic acid

(2S)-3-(1-{[(9H-fluoren-9-yl)methoxy]carbonyl}piperidin-4-yl)-2-methylpropanoic acid

(2S)-3-(1H-imidazol-4-yl)-2-(2-phenylacetamido)propanoic acid

(2S)-3-(1H-imidazol-4-yl)-2-(3-phenylpropanamido)propanoic acid

(2S)-3-(1H-imidazol-4-yl)-2-(phenylformamido)propanoic acid

(2S)-3-(2,2-difluorocyclopropyl)-2-hydroxypropanoic acid

(2S)-3-(2,2-dimethyl-1,3-dioxaindan-5-yl)-2-({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)propanoic acid