Ethyl 4-cyclohexyloxybenzoate

4-[(6-cyanopyridin-3-yl)carbamoyl]-4-({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)butanoic acid

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

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

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

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

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

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

rac-4-{[(1R,3S)-3-[({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)methyl]-2,2-difluorocyclopropyl]formamido}-3,3-dimethylbutanoic acid

4-({5-[({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)methyl]oxolan-3-yl}formamido)-3,3-dimethylbutanoic acid

rac-(1R,6S)-3-[3-({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)-2-methoxypropanoyl]-3-azabicyclo[4.1.0]heptane-7-carboxylic acid