8-[[Benzyl(methyl)amino]methyl]-1,3-dimethyl-7-[(2-methylphenyl)methyl]-4,5-dihydropurine-2,6-dione

2-[N-(butan-2-yl)-1-[2-({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)-1-methylcyclopentyl]formamido]acetic acid

1-[2-({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)-1-methylcyclopentanecarbonyl]-2-methylpyrrolidine-2-carboxylic acid

5-[7-({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)heptanamido]hexanoic acid

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

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

5-[3-({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)-2-methylpropanamido]pentanoic acid

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

2-[3-({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)-N-(2-methylpropyl)propanamido]acetic acid

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

3-[(3-cyanopropyl)carbamoyl]-3-({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)propanoic acid