1-(3-oxo-3-(4-(pyridin-2-yl)piperazin-1-yl)propyl)-4-propylthieno[2,3-e][1,2,4]triazolo[4,3-a]pyrimidin-5(4H)-one

1-[(2R)-2-({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)-4-(methylsulfanyl)butanoyl]-3,4-dimethylpyrrolidine-3-carboxylic acid

1-[2-({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)hex-5-enoyl]-3,4-dimethylpyrrolidine-3-carboxylic acid

rac-(3R,4R)-1-{2-[2-({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)acetamido]acetyl}-3,4-dimethylpyrrolidine-3-carboxylic acid

1-[1-({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)cyclobutanecarbonyl]-3,4-dimethylpyrrolidine-3-carboxylic acid

rac-(3aR,6aR)-2-[3-({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)-2,2-difluoropropanoyl]-octahydrocyclopenta[c]pyrrole-3a-carboxylic acid

2-[2-({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)acetyl]-octahydrocyclopenta[c]pyrrole-3a-carboxylic acid

2-[3-({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)propanoyl]-octahydrocyclopenta[c]pyrrole-3a-carboxylic acid

2-[(2R)-2-({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)propanoyl]-octahydrocyclopenta[c]pyrrole-3a-carboxylic acid

2-[4-({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)but-2-enoyl]-octahydrocyclopenta[c]pyrrole-3a-carboxylic acid

2-[2-({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)-2-methylpropanoyl]-octahydrocyclopenta[c]pyrrole-3a-carboxylic acid