1-(1-Methyl-1H-pyrazol-3-yl)piperidine

4-{[1-benzyl-3-({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)pyrrolidin-3-yl]formamido}pentanoic acid

2-{2-[({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)methyl]pentanoyl}-2-azabicyclo[2.1.1]hexane-1-carboxylic acid

2-[(2S)-2-({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)-4-methylpentanoyl]-2-azabicyclo[2.1.1]hexane-1-carboxylic acid

2-[(2R)-2-({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)-4-(methylsulfanyl)butanoyl]-2-azabicyclo[2.1.1]hexane-1-carboxylic acid

2-[2-({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)benzoyl]-2-azabicyclo[2.1.1]hexane-1-carboxylic acid

2-[3-({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)benzoyl]-2-azabicyclo[2.1.1]hexane-1-carboxylic acid

2-[(3S)-3-({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)pentanamido]-2-(1-methyl-1H-pyrazol-5-yl)acetic acid

4-[(3S)-3-({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)pentanoyl]-1,4-oxazepane-6-carboxylic acid

2-ethyl-3-[(3S)-3-({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)pentanoyl]-1,3-thiazolidine-4-carboxylic acid

(3aRS,6aRS)-4-[(3S)-3-({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)pentanoyl]-hexahydro-2H-furo[3,2-b]pyrrole-5-carboxylic acid