(E)-1-(2-chloroimidazo[1,2-a]pyridin-3-yl)-3-(dimethylamino)prop-2-en-1-one

2-{4-[3-({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)-2-methylbutanamido]oxan-4-yl}acetic acid

2-[N-(2,2-dimethylpropyl)-1-[5-({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)-1H-1,2,4-triazol-3-yl]formamido]acetic acid

rac-2-({[(1R,5S)-5-({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)cyclohex-3-en-1-yl]formamido}methyl)-2-methylbutanoic acid

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

2-({2-[({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)methyl]-4,4-dimethylpentanamido}oxy)propanoic acid

2-({[3-chloro-4-({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)phenyl]formamido}oxy)propanoic acid

2-{[4-({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)-2-methylbut-2-enamido]methyl}-3,3,3-trifluoropropanoic acid

2-[3-({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)butanamido]-4-methylhexanoic acid

4-{2-[1-({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)cyclobutyl]acetamido}-3-methylbutanoic acid

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