2-(Butan-2-yl)-6-(pyrrolidin-3-yl)pyrimidin-4-ol

(2S)-2-{[1-({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)cyclopentyl]formamido}-3-hydroxypropanoic acid

(2RS,3SR)-3-[(2S)-2-({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)propanamido]oxolane-2-carboxylic acid

3-{1-[3-({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)oxolane-2-carbonyl]pyrrolidin-3-yl}propanoic acid

(2S)-2-({3-[({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)methyl]-2,2-difluorocyclopropyl}formamido)-3-methylbutanoic acid

4-(1-{3-[({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)methyl]-2,2-difluorocyclopropyl}-N-methylformamido)butanoic acid

(3R)-1-{3-[({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)methyl]-2,2-difluorocyclopropanecarbonyl}piperidine-3-carboxylic acid

1-{3-[({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)methyl]-2,2-difluorocyclopropanecarbonyl}-4-methylpyrrolidine-3-carboxylic acid

2-{3-[({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)methyl]-2,2-difluorocyclopropaneamido}cyclopentane-1-carboxylic acid

rac-2-{[(1R,2S)-2-[({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)methyl]cyclopropyl]formamido}-4,4,4-trifluorobutanoic acid

rac-3-{1-[(1R,3S)-3-[({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)methyl]-2,2-difluorocyclopropyl]-N-methylformamido}-2-methylpropanoic acid