(2S)-2-acetamido-3-pyrimidin-5-yl-propanoic acid

5-{[3-({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)oxolan-3-yl]formamido}-3-methylpentanoic acid

rac-(1R,2S)-2-{[5-({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)-3-methylpentanamido]methyl}cyclopentane-1-carboxylic acid

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

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

2-{2-[2-({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)-2-methylbutanamido]phenyl}acetic acid

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

3-{4-[(2R)-2-({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)-3-methylbutanoyl]piperazin-1-yl}propanoic acid

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

1-{2-[1-({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)cyclopentyl]acetamido}cyclopentane-1-carboxylic acid

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