6-Chloro-3-acetamido-5-hydroxypyrazine-2-carboxylic acid

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

2-({3-[benzyl(methyl)amino]-2-({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)propanamido}oxy)acetic acid

2-{3-[benzyl(methyl)amino]-2-({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)propanoyl}-4-methyl-2-azabicyclo[2.1.1]hexane-1-carboxylic acid

3-({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)-3-[(3-hydroxy-2-methoxy-2-methylpropyl)carbamoyl]propanoic acid

4-({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)-4-{[2-(2-fluoroethoxy)ethyl]carbamoyl}butanoic acid

3-{[3-(benzyloxy)-2-methoxy-2-methylpropyl]carbamoyl}-3-({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)propanoic acid

3-({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)-4-(3-methanesulfonamidopyrrolidin-1-yl)-4-oxobutanoic acid

3-({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)-3-[(4-hydroxy-4-methylcyclohexyl)carbamoyl]propanoic acid

2-[4-({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)-3-hydroxy-N-methylbutanamido]butanoic acid

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