3-{1-[3-({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)oxolan-2-yl]-N-(propan-2-yl)formamido}propanoic acid

2-{N-tert-butyl-1-[2-({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)-4-methyl-1,3-thiazol-5-yl]formamido}acetic acid

2-[N-tert-butyl-7-({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)heptanamido]acetic acid

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

5-{[(2S)-2-({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)-3-methylpentanamido]methyl}oxolane-2-carboxylic acid

4-{3-[({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)methyl]-5-methylhexanamido}pentanoic acid

4-[(3S)-3-[({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)methyl]-5-methylhexanamido]pentanoic acid

2-{[2-({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)-4-methyl-1,3-thiazol-5-yl]formamido}-3,3-dimethylbutanoic acid

2-{[2-({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)-4-methyl-1,3-thiazol-5-yl]formamido}-2-methylpentanoic acid

4-({2-[({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)methyl]butanamido}methyl)cyclohexane-1-carboxylic acid

5-[1-({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)cyclopropanecarbonyl]-3H,4H,5H,6H,7H-imidazo[4,5-c]pyridine-6-carboxylic acid