6-Chloro-2-[1-(pyridine-4-carbonyl)piperidin-4-yl]-1,8-naphthyridine

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

(2S)-2-{[4-({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)-1-methyl-1H-pyrazol-5-yl]formamido}propanoic acid

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

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

2-{1-[2-({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)-1,3-thiazole-5-carbonyl]pyrrolidin-3-yl}acetic acid

7-Bromo-3-ethylquinoline-4-carboxylic acid

rac-2-[(1R,2S)-2-[({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)methyl]cyclopropaneamido]-3-fluorobenzoic acid

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

3-[2-cyclopropyl-2-({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)acetamido]-2-fluorobenzoic acid

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