1-[5-(1,3-Dioxolan-2-yl)-1,3-thiazol-2-yl]-2,2,2-trifluoroethan-1-one

3-({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)-3-{[1-(1,3-thiazol-4-yl)ethyl]carbamoyl}propanoic acid

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

rac-(3aR,6aR)-2-[5-({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)pentanoyl]-octahydrocyclopenta[c]pyrrole-3a-carboxylic acid

rac-(3aR,6aR)-2-[2-({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)-3-methylbutanoyl]-octahydrocyclopenta[c]pyrrole-3a-carboxylic acid

4-(1-{2-[({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)methyl]-3-methylbutanoyl}azetidin-3-yl)butanoic acid

4-{1-[(2S)-2-({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)-4-methylpentanoyl]azetidin-3-yl}butanoic acid

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

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

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

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