tert-butyl N-[[4-[(1,3-dioxoisoindol-2-yl)oxymethyl]benzoyl]amino]carbamate

3-[N-cyclopropyl-4-(dimethylamino)-2-({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)butanamido]propanoic acid

1-[4-(dimethylamino)-2-({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)butanoyl]-2-methylpyrrolidine-2-carboxylic acid

2-[4-({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)-3,3-dimethylbutanamido]-3,3,3-trifluoro-2-methylpropanoic acid

2-(1-{3-[2-({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)ethoxy]propanoyl}-4-methylpyrrolidin-3-yl)acetic acid

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

rac-2-[(3R,4R)-1-{2-[2-({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)acetamido]acetyl}-4-methylpyrrolidin-3-yl]acetic acid

rac-2-[(3R,4R)-1-[2-({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)-3-methoxy-2-methylpropanoyl]-4-methylpyrrolidin-3-yl]acetic acid

rac-2-[(3R,4R)-1-[2-({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)-4-methoxybutanoyl]-4-methylpyrrolidin-3-yl]acetic acid

rac-2-[(3R,4R)-1-[2-({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)-4,4-difluorobutanoyl]-4-methylpyrrolidin-3-yl]acetic acid

2-[(3RS,4RS)-1-[(2S)-2-({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)-4-(methylsulfanyl)butanoyl]-4-methylpyrrolidin-3-yl]acetic acid