(2R,3R)-4,4-Dimethylpentane-2,3-diol

2-{1-[(3S)-3-({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)butanamido]cyclopentyl}acetic acid

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

2-[2-({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)-N-(2-hydroxyethyl)-2-(1-methyl-1H-pyrazol-5-yl)acetamido]acetic acid

2-[4-(dimethylamino)-N-ethyl-2-({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)butanamido]acetic acid

(2R)-2-{[5-({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)-1-methyl-1H-pyrazol-4-yl]formamido}-4-hydroxybutanoic acid

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

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

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

5-[2-({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)-1,3-thiazole-5-amido]-1-methyl-1H-pyrazole-3-carboxylic acid

1-[4-({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)-4-methylpentanoyl]-1,2,3,6-tetrahydropyridine-4-carboxylic acid