3-(1,1,2,2,2-Pentafluoroethyl)azetidine

4-({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)-4-[(1-hydroxy-4,4-dimethylpentan-3-yl)carbamoyl]butanoic acid

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

1-[2-({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)-3,3,3-trifluoro-2-methylpropanoyl]azetidine-2-carboxylic acid

1-{2-[2-({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)ethoxy]acetyl}azetidine-2-carboxylic acid

1-{2-[({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)methyl]-4,4-dimethylpentanoyl}azetidine-2-carboxylic acid

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

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

3-[(2,2-difluoroethyl)(propan-2-yl)carbamoyl]-3-({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)propanoic acid

2-(1-{4-[({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)methyl]-1-methyl-1H-pyrazol-5-yl}-N-methylformamido)butanoic acid

3-{1-[5-({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)pyridine-2-carbonyl]azetidin-3-yl}propanoic acid