1-(Furan-3-ylmethyl)-3-(naphthalen-1-ylmethyl)-1-(2-(thiophen-2-yl)ethyl)urea

1-[3-({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)-2-methylbutanoyl]-5-hydroxypiperidine-3-carboxylic acid

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

3-[4-({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)hexanamido]-4,4,4-trifluorobutanoic acid

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

3-[benzyl(methyl)amino]-2-[4-({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)pentanamido]propanoic acid

3-{3-[benzyl(methyl)amino]-2-({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)-N-methylpropanamido}-2-methylpropanoic acid

(2S)-2-[6-({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)-4,4-dimethylhexanamido]butanoic acid

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

2-[(2S)-2-({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)-N,3-dimethylpentanamido]-2-methylpropanoic acid

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