3-[Acetyl(cyclohexyl)amino]propanoic acid

3-[2-({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)-N,3-dimethylbutanamido]cyclobutane-1-carboxylic acid

1-[(2R)-2-({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)-3,3-dimethylbutanoyl]-4,4-difluoropyrrolidine-3-carboxylic acid

2-{2-[4-({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)but-2-ynamido]phenyl}acetic acid

5-[4-({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)but-2-ynamido]-2-methylbenzoic acid

2-[4-({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)but-2-ynamido]-5-methylbenzoic acid

(2R)-2-[4-({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)but-2-ynamido]-2-phenylacetic acid

3-chloro-4-[4-({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)but-2-ynamido]benzoic acid

4-chloro-2-[4-({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)but-2-ynamido]benzoic acid

(1rs&,3rs&)-3-[(1RS,3RS)-3-({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)cyclohexaneamido]cyclobutane-1-carboxylic acid

rac-tert-butyl (3R,4S)-3-(3-chlorophenyl)-4-hydroxypyrrolidine-1-carboxylate