3-Fluoro-3-(pyrazin-2-yl)propan-1-amine

2-{3-[(2R)-2-({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)-3-methylbutanamido]cyclobutyl}acetic acid

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

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

1-{2-[3-({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)cyclobutyl]acetyl}-5-methylpiperidine-3-carboxylic acid

2-{3-[3-({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)pyridine-2-amido]cyclobutyl}acetic acid

2-{3-[2-({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)-5-methoxypentanamido]cyclobutyl}acetic acid

5-{2-[3-({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)cyclobutyl]acetamido}pentanoic acid

rac-(1R,2R,4S)-7-[3-({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)-2-methylpropanoyl]-7-azabicyclo[2.2.1]heptane-2-carboxylic acid

rac-(1R,2R,4S)-7-[2-({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)pent-4-enoyl]-7-azabicyclo[2.2.1]heptane-2-carboxylic acid

2-{3-[1-({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)cyclohexyl]propanamido}acetic acid