1-benzyl-3-[1-benzyl-3-({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)pyrrolidine-3-amido]pyrrolidine-3-carboxylic acid

tert-Butyl 3-oxo-1-thia-8-azaspiro[4.5]decane-8-carboxylate 1,1-dioxide

1-[(3S)-3-({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)butanoyl]azocane-2-carboxylic acid

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

3-[(3,3-difluoro-2-methylbutan-2-yl)carbamoyl]-3-({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)propanoic acid

1-[4-({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)-3-hydroxybutanoyl]azetidine-3-carboxylic acid

3-[2-(cyclopropylmethyl)-3-({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)propanamido]propanoic acid

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

1-[2-(cyclopropylmethyl)-3-({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)propanoyl]-4-methylpyrrolidine-3-carboxylic acid

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

3-{5-[({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)methyl]-1,2-oxazole-3-carbonyl}-2-methyl-1,3-thiazolidine-4-carboxylic acid