3-(3-Bromo-2-fluoro-6-methylphenyl)-2,2-difluoropropanoic acid

rac-(1R,2S)-2-({[5-({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)-1,2-oxazol-3-yl]formamido}methyl)cyclopentane-1-carboxylic acid

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

4-[(5-cyclopropyl-1,3,4-oxadiazol-2-yl)carbamoyl]-4-({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)butanoic acid

2-[3-({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)butanamido]-2-phenylacetic acid

3-[benzyl(cyclopropyl)carbamoyl]-3-({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)propanoic acid

4-({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)-4-[(2-hydroxy-2-methylpentan-3-yl)carbamoyl]butanoic acid

3-{[(3-ethyloxetan-3-yl)methyl]carbamoyl}-3-({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)propanoic acid

1-[4-({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)cyclopent-2-ene-1-carbonyl]-6-methylpiperidine-3-carboxylic acid

(2R)-1-[(1rs,4rs)-4-({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)cyclohexanecarbonyl]pyrrolidine-2-carboxylic acid

(2S)-2-{2-[2-({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)ethoxy]acetamido}-3-methoxypropanoic acid