2-(1,3-Dioxolan-2-yl)pyrrolidine-1-sulfonyl chloride

(2R,3S)-3-(benzyloxy)-2-{[3-({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)-5-fluorophenyl]formamido}butanoic acid

3-[3-({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)cyclobutaneamido]-5-fluorobenzoic acid

3-[(2R,3S)-3-(benzyloxy)-2-({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)butanamido]-5-fluorobenzoic acid

3-[(2S)-2-({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)-3-methoxypropanamido]-5-fluorobenzoic acid

(2S)-2-{[1-benzyl-4-({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)piperidin-4-yl]formamido}-3-(dimethylamino)propanoic acid

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

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

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

1-[(2R)-2-({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)-3,3-dimethylbutanoyl]-4,4-dimethylpyrrolidine-3-carboxylic acid

1-{2-[({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)methyl]-2-methylbutanoyl}-4,4-dimethylpyrrolidine-3-carboxylic acid