2-(1-{Pyrazolo[1,5-a]pyrimidin-6-yl}cyclobutyl)ethan-1-amine

1-[(3R)-3-({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)butanoyl]piperidine-4-carboxylic acid

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

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

(2S)-2-[(3R)-3-({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)-N-methylbutanamido]propanoic acid

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

(1RS,3SR)-3-{[(2S)-2-({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)butanamido]methyl}-2,2-difluorocyclopropane-1-carboxylic acid

(2S,4R)-1-[(1RS,3RS)-3-({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)cyclohexanecarbonyl]-4-hydroxypyrrolidine-2-carboxylic acid

rac-4-[(1R,3R)-3-({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)cyclohexanecarbonyl]morpholine-3-carboxylic acid

rac-3-{[(1R,3R)-3-({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)cyclohexyl]formamido}-2-methylpropanoic acid

rac-2-{[(1R,3R)-3-({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)cyclohexyl]formamido}-2-methylpropanoic acid