(1S)-1-(6-methylpyridin-2-yl)ethan-1-amine

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

(2S)-1-[4-bromo-3-({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)benzoyl]pyrrolidine-2-carboxylic acid

(2S)-2-{[2-({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)-3-fluorophenyl]formamido}pentanoic acid

2-{1-[(2R)-2-({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)-4-(methylsulfanyl)butanoyl]piperidin-3-yl}acetic acid

2-(1-{1-[({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)methyl]cyclopropanecarbonyl}pyrrolidin-2-yl)acetic acid

4-{[4-chloro-3-({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)phenyl]formamido}but-2-enoic acid

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

3-(2-{2-[({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)methyl]-2-methylbutanamido}ethoxy)propanoic acid

2-[2-cyclobutyl-2-({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)acetamido]-1-methylcyclopentane-1-carboxylic acid

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