1'-(4-(Pyrrolidin-1-ylsulfonyl)benzoyl)spiro[chroman-2,4'-piperidin]-4-one

4-(2,2-dimethyl-3,5-dioxopiperazin-1-yl)-3-({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)-4-oxobutanoic acid

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

tert-butyl N-[5-(3-aminopropyl)-4-methyl-1,3-thiazol-2-yl]carbamate

2-(2-{[(Tert-butoxy)carbonyl]amino}-4-methyl-1,3-thiazol-5-yl)propanoic acid

tert-butyl N-{5-[(1R)-1-aminoethyl]-4-methyl-1,3-thiazol-2-yl}carbamate

3-(4-{[(Tert-butoxy)carbonyl]amino}-3-methylphenyl)-2-methylpropanoic acid

tert-butyl N-[2-amino-1-(4-chloro-2-methylphenyl)ethyl]carbamate

rac-1-{2-[(1R,2S)-2-({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)cyclopentyl]acetyl}-2-methylpyrrolidine-2-carboxylic acid

2-{2-[2-({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)cyclopentyl]acetamido}-3-methoxy-2-methylpropanoic acid

4-[(2R,3S)-3-(benzyloxy)-2-({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)butanamido]-1-methyl-1H-pyrazole-3-carboxylic acid