{1-[2-(Methylsulfanyl)phenyl]cyclobutyl}methanamine

2-{1-[2-cyclopropyl-2-({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)acetamido]cyclopentyl}acetic acid

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

1-[2-cyclopropyl-2-({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)acetamido]cyclohexane-1-carboxylic acid

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

2-{2-[({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)methyl]-3-methylbutanoyl}-2-azabicyclo[2.1.1]hexane-5-carboxylic acid

2-[4-({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)-4-methylpentanoyl]-2-azabicyclo[2.1.1]hexane-5-carboxylic acid

4-(2-Chloro-6-methylpyridin-3-yl)oxane-2,6-dione

2-[4-({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)-3-methoxybutanoyl]-2-azabicyclo[2.1.1]hexane-5-carboxylic acid

rac-2-[(1R,2S)-2-[({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)methyl]cyclopentanecarbonyl]-2-azabicyclo[2.1.1]hexane-5-carboxylic acid

(2RS,3SR)-3-[(1RS&,2SR&)-2-({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)cyclohexaneamido]oxolane-2-carboxylic acid