1-(5-Ethoxy-2-(hydroxymethyl)phenyl)hydrazine

(2R)-2-{[2-({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)-1-methylcyclopentyl]formamido}-4-(methylsulfanyl)butanoic acid

2-[(2S)-N-cyclopropyl-2-({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)-2-phenylacetamido]acetic acid

Methyl 4-(1-amino-2,2-difluorocyclopropyl)-2-methylbenzoate

(2S)-2-[(2S)-2-({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)-2-phenylacetamido]-3-methylbutanoic acid

2-[(2R)-2-({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)-4-methyl-N-(2,2,2-trifluoroethyl)pentanamido]acetic acid

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

2-[N-cyclopentyl-4-({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)-3-methoxybutanamido]acetic acid

3-({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)-4-oxo-4-{5-oxo-octahydro-1H-pyrrolo[3,4-b]pyridin-1-yl}butanoic acid

5-[4-({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)-3-methoxybutanamido]pyridine-2-carboxylic acid

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