1-(1-(2,3-Dihydrobenzofuran-5-yl)propan-2-yl)-3-(2-methoxyethyl)urea

2-{2-[2-({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)ethoxy]acetamido}-4,4-difluorobutanoic acid

(2S)-2-[3-({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)-N,2,2,3-tetramethylbutanamido]propanoic acid

(2S)-2-(1-{1-[({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)methyl]cyclopentyl}-N-methylformamido)propanoic acid

2-{[2-({1-[2-({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)ethyl]-1H-imidazol-4-yl}formamido)ethyl]sulfanyl}acetic acid

2-({2-[2-({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)-2-(1-methyl-1H-pyrazol-4-yl)acetamido]ethyl}sulfanyl)acetic acid

2-{[2-({1-[({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)methyl]cyclobutyl}formamido)ethyl]sulfanyl}acetic acid

2-bromo-5-(2-{[2-({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)ethyl]sulfanyl}acetamido)benzoic acid

2-[3-({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)-2-methylpropanamido]-1-methylcyclopentane-1-carboxylic acid

3-[2-({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)-2-methylbutanamido]-4-methylpentanoic acid

2-cyclopropyl-2-{2-[({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)methyl]-2-methylbutanamido}acetic acid