5H,6H,7H-pyrrolo[1,2-a]imidazol-3-amine hydrochloride

2-[(2S)-1-[2-cyclobutyl-2-({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)acetyl]piperidin-2-yl]acetic acid

2-{[2-({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)-4-methylpentanamido]methyl}-3,3,3-trifluoropropanoic acid

3-[(2S)-2-({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)-3,3-dimethylbutanamido]-2-(trifluoromethyl)propanoic acid

3-[benzyl(methyl)amino]-2-{2-[({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)methyl]-3,3,3-trifluoropropanamido}propanoic acid

3-({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)-3-{[(2-methylprop-2-en-1-yl)oxy]carbamoyl}propanoic acid

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

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

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

rac-(1R,6S)-2-[2-({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)-4-(methylsulfanyl)butanoyl]-2-azabicyclo[4.1.0]heptane-1-carboxylic acid

2-[4-({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)but-2-enoyl]-2-azabicyclo[4.1.0]heptane-1-carboxylic acid