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

(2S)-2-({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)-3-[1-(triphenylmethyl)-1H-imidazol-4-yl]propanoic acid

(2S)-2-({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)-3-[4-(methoxycarbonyl)phenyl]propanoic acid

(2S)-2-({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)-3-[4-(phosphonooxy)phenyl]propanoic acid

(2S)-2-({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)-3-[4-(triethylsilyl)phenyl]propanoic acid

(2S)-2-({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)-3-[4-(trifluoromethyl)-1-benzothiophen-3-yl]propanoic acid

(2S)-2-({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)-3-[4-(trifluoromethyl)phenyl]propanoic acid

(2S)-2-({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)-3-[7-(trifluoromethyl)-1-benzothiophen-3-yl]propanoic acid

(2S)-2-({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)-3-{3-[(fluorosulfonyl)oxy]phenyl}propanoic acid

(2S)-2-({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)-3-{4-[(fluorosulfonyl)oxy]phenyl}propanoic acid

(2S)-2-({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)-4,4,4-trifluorobutanoic acid

(2S)-2-({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)-4,4-dimethylhex-5-enoic acid

(2S)-2-({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)-4-(1H-1,2,3,4-tetrazol-5-yl)butanoic acid

(2S)-2-({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)-4-(3-methyl-3H-diazirin-3-yl)butanoic acid

(2S)-2-({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)-4-(methylsulfanyl)butanoic acid

(2S)-2-({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)-4-fluoro-4-methylpentanoic acid

(2S)-2-({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)-4-methanesulfinylbutanoic acid

(2S)-2-({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)-4-methanesulfonylbutanoic acid

(2S)-2-({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)-4-methoxy-4-oxobutanoic acid

(2S)-2-({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)-4-methylpentanoic acid

(2S)-2-({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)-4-phenoxybutanoic acid

(2S)-2-({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)-4-phenylbutanoic acid

(2S)-2-({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)-4-[(triphenylmethyl)carbamoyl]butanoic acid

(2S)-2-({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)-5,5-difluoropentanoic acid

(2S)-2-({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)-5-methoxy-5-oxopentanoic acid

(2S)-2-({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)-5-oxo-5-(prop-2-en-1-yloxy)pentanoic acid

(2S)-2-({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)-5-[(pyridin-2-yl)amino]pentanoic acid

(2S)-2-({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)-5-[N'-(4-methoxy-2,3,6-trimethylbenzenesulfonyl)carbamimidamido]pentanoic acid

(2S)-2-({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)-5-{N'-[(2,2,4,6,7-pentamethyl-2,3-dihydro-1-benzofuran-5-yl)sulfonyl]carbamimidamido}pentanoic acid

(2S)-2-({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)-6,6,6-trifluorohexanoic acid

(2S)-2-({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)-6,6-dimethylhept-4-ynoic acid

(2S)-2-({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)-6-{[(prop-2-en-1-yloxy)carbonyl]amino}hexanoic acid

(2S)-2-({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)butanoic acid

(2S)-2-({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)hept-6-ynoic acid

(2S)-2-({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)heptanoic acid

(2S)-2-({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)hex-5-ynoic acid

(2S)-2-({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)hexanoic acid

(2S)-2-({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)pentanedioic acid

(2S)-2-({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)pentanoic acid

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

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

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

(2S)-2-({[2-(4-methoxyphenyl)ethyl]carbamoyl}amino)-3-methylbutanoic acid

(2S)-2-acetamido-3,3-dimethylbutanoic acid

(2S)-2-acetamido-3-(1-methyl-1H-imidazol-5-yl)propanoic acid