2-Amino-5-(3-methoxyphenyl)-5-[(4-methoxyphenyl)methyl]-4,5-dihydro-1H-imidazol-4-one

rac-4-{[(1R,3S)-3-({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)cyclohexyl]formamido}-3-hydroxy-3-methylbutanoic acid

rac-4-{[(1R,3S)-3-({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)cyclohexyl]formamido}-3-methoxybutanoic acid

(2R)-1-[3-({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)-4,4-difluorobutanoyl]pyrrolidine-2-carboxylic acid

2-{1-[3-({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)-4,4-difluorobutanoyl]-4-methylpyrrolidin-3-yl}acetic acid

7-[(2S)-2-({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)-4-methylpentanoyl]-7-azabicyclo[2.2.1]heptane-1-carboxylic acid

4-[(2S)-2-({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)butanamido]-1-methyl-1H-pyrazole-5-carboxylic acid

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

3-[4-({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)-1-methyl-1H-pyrazole-5-amido]cyclopentane-1-carboxylic acid

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

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