2-hydroxy-N-((8-hydroxy-[1,2,4]triazolo[4,3-a]pyrazin-3-yl)methyl)quinoline-4-carboxamide

4-[3-(dimethylamino)-2-({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)propanoyl]-1,4-oxazepane-6-carboxylic acid

4-{3-[benzyl(methyl)amino]-2-({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)propanamido}but-2-enoic acid

1-{3-[benzyl(methyl)amino]-2-({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)propanoyl}azetidine-3-carboxylic acid

1-{3-[benzyl(methyl)amino]-2-({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)propanamido}cyclopropane-1-carboxylic acid

1-{3-[({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)methyl]-N,4-dimethylpentanamido}cyclobutane-1-carboxylic acid

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

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

(3R)-1-[3-cyclopropyl-4-({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)butanoyl]piperidine-3-carboxylic acid

1-[3-cyclopropyl-4-({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)butanamido]cyclopentane-1-carboxylic acid

3-{2-[4-({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)oxan-4-yl]acetamido}-2-hydroxypropanoic acid