(3S)-1-(6-nitro-3-pyridyl)piperidin-3-amine

2-ethyl-2-[(3R)-3-({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)pentanamido]butanoic acid

2-[(3R)-3-({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)-N-(prop-2-en-1-yl)pentanamido]acetic acid

2-[(3R)-3-({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)pentanamido]-4-fluorobenzoic acid

3-[5-({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)pyridine-2-carbonyl]-3-azabicyclo[3.1.0]hexane-1-carboxylic acid

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

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

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

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

3-[4-({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)-3-methyloxolane-3-carbonyl]-3-azabicyclo[3.1.0]hexane-1-carboxylic acid

3-[4-({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)oxane-4-carbonyl]-3-azabicyclo[3.1.0]hexane-1-carboxylic acid