5-[4-hydroxy-5-(hydroxymethyl)-3-methoxyoxolan-2-yl]-1H-pyrimidine-2,4-dione

4-[(3R)-3-({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)pentanamido]-4-methylpentanoic acid

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

(3S)-3-{[4-({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)-1,2,5-oxadiazol-3-yl]formamido}butanoic acid

(3S)-3-{[3-({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)bicyclo[3.1.0]hexan-1-yl]formamido}hexanoic acid

(3R)-3-{2-[3-({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)cyclobutyl]acetamido}hexanoic acid

2-{1-[4-({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)-N-methylbutanamido]cyclohexyl}acetic acid

3-bromo-4-{2-[2-({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)ethoxy]acetamido}benzoic acid

1-[2-({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)-4-methyl-1,3-thiazole-5-carbonyl]-2-methylpyrrolidine-3-carboxylic acid

4-{1-[4-bromo-2-({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)phenyl]-N-methylformamido}butanoic acid

4-({1-[({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)methyl]cyclobutyl}formamido)butanoic acid