(3S)-3-[(2S)-3-(benzyl carboxy)-2-({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)propanamido]butanoic acid

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

4-[2-({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)-3-(1,3-thiazol-5-yl)propanamido]-2-methylbut-2-enoic acid

3-(N-benzyl-2-{2-[({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)methyl]-1,3-thiazol-4-yl}acetamido)propanoic acid

(2S)-4-(2-{2-[({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)methyl]-1,3-thiazol-4-yl}acetamido)-2-hydroxybutanoic acid

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

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

4-(2,2,3,3-Tetrafluoropropyl)oxolan-3-ol

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

5-[2-({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)-N,5-dimethylhex-4-enamido]pentanoic acid

(1RS,2RS,4SR)-7-[(1RS&,2SR&)-2-[({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)methyl]cyclopropanecarbonyl]-7-azabicyclo[2.2.1]heptane-2-carboxylic acid