3-Bromo-5-fluoropyrazolo[1,5-a]pyridine

2-{4-[2-({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)acetyl]-2-oxopiperazin-1-yl}acetic acid

2-{4-[(2S)-2-({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)butanoyl]-2-oxopiperazin-1-yl}acetic acid

2-{4-[3-({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)-2-methoxypropanoyl]-2-oxopiperazin-1-yl}acetic acid

3-[3-(benzyloxy)-2-({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)butanoyl]-3-azabicyclo[3.1.0]hexane-1-carboxylic acid

2-{4-[4-({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)butanoyl]-2-oxopiperazin-1-yl}propanoic acid

2-{3-[(2R,3S)-3-(benzyloxy)-2-({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)butanamido]phenyl}acetic acid

(2S,3R)-3-(benzyloxy)-2-[2-({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)-2-methylpentanamido]butanoic acid

(2R,3S)-3-(benzyloxy)-2-({2-[({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)methyl]pyridin-4-yl}formamido)butanoic acid

2-[(2R,3S)-3-(benzyloxy)-N-ethyl-2-({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)butanamido]acetic acid

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