B-(5-Cyano-2-nitrophenyl)boronic acid

5-{[(2R,3S)-3-(benzyloxy)-2-({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)-N-methylbutanamido]methyl}furan-2-carboxylic acid

2-{4-[3-({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)propanoyl]-1,1-dioxo-1lambda6-thiomorpholin-2-yl}acetic acid

1-(1-ethyl-1H-1,2,4-triazol-5-yl)cyclopentane-1-carboxylic acid

5-[(2R)-N-ethyl-2-({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)-4-(methylsulfanyl)butanamido]pentanoic acid

3-(2-{1-[({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)methyl]cyclobutyl}acetamido)-4,4-difluorobutanoic acid

7-[2-({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)pent-4-ynoyl]-7-azabicyclo[2.2.1]heptane-1-carboxylic acid

7-[3-(dimethylamino)-2-({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)propanoyl]-7-azabicyclo[2.2.1]heptane-1-carboxylic acid

3-({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)-3-{[1-(1,3-thiazol-5-yl)ethyl]carbamoyl}propanoic acid

(2S,3R)-2-[(2R)-2-({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)-4-methylpentanamido]-3-methoxybutanoic acid

(2S,3R)-2-({5-[({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)methyl]furan-2-yl}formamido)-3-methoxybutanoic acid