3-(Aminomethyl)-3-[4-(2-methylpropyl)phenyl]cyclobutan-1-ol

(2S)-4-methoxy-4-oxo-2-{[(1rs,3rs)-3-({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)cyclobutyl]formamido}butanoic acid

2-cyclopropyl-2-{[2-(ethyl carboxy)-2-({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)acetamido]oxy}acetic acid

3-{1-[(2S)-4-(benzyloxy)-2-({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)-4-oxobutanoyl]azetidin-3-yl}propanoic acid

(2R)-2-[(3R)-3-({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)butanamido]-4-methoxy-4-oxobutanoic acid

2-({1-[(2S)-4-(benzyloxy)-2-({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)-4-oxobutanoyl]azetidin-3-yl}oxy)acetic acid

3-({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)-4-[3-hydroxy-3-(methoxycarbonyl)azetidin-1-yl]-4-oxobutanoic acid

(2S)-2-[(3S)-3-({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)pentanamido]-5-methoxy-5-oxopentanoic acid

(3RS,4RS)-1-[(2S)-4-(benzyloxy)-2-({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)-4-oxobutanoyl]-3,4-dimethylpyrrolidine-3-carboxylic acid

6-(2-Fluoro-4-methoxyphenyl)pyridazine-3-carboxylic acid

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