Ethyl 3-hydroxy-5-methyl-2-oxohexanoate

2-({[4-({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)-1,2,5-oxadiazol-3-yl]formamido}oxy)acetic acid

(2R)-2-({1-[({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)methyl]cyclopentyl}formamido)-4-(methylsulfanyl)butanoic acid

2-(1-{[(2R)-2-({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)-4-methylpentanamido]methyl}cyclobutyl)acetic acid

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

2-{4-[(2R)-2-({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)-4-(methylsulfanyl)butanoyl]morpholin-3-yl}acetic acid

(2R)-2-[2-({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)-2-methylpropanamido]-3-phenylpropanoic acid

2-[(2R)-2-({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)-3-(4-hydroxyphenyl)-N-methylpropanamido]acetic acid

3-{4-[2-({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)propanamido]phenyl}butanoic acid

(2S)-2-{3-[4-({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)phenyl]butanamido}propanoic acid

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