3-(3-Fluorophenyl)-8-((2-fluorophenyl)sulfonyl)-1,4,8-triazaspiro[4.5]dec-3-en-2-one

4-[4-({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)-3-hydroxybutanamido]cyclopent-1-ene-1-carboxylic acid

2-{N-benzyl-1-[6-({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)-7,7-dimethyl-2-oxabicyclo[3.2.0]heptan-6-yl]formamido}acetic acid

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

2-(N-benzyl-2-{[2-({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)ethyl]sulfanyl}acetamido)acetic acid

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

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

(3S)-3-[5-cyano-2-({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)pentanamido]butanoic acid

2-(1-{1-[({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)methyl]cyclobutyl}-N-[2-(methylsulfanyl)ethyl]formamido)acetic acid

5-(2-cyclobutylazetidin-1-yl)-4-({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)-5-oxopentanoic acid

2-(2-{3-[({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)methyl]cyclobutyl}acetyl)-2-azabicyclo[2.1.1]hexane-1-carboxylic acid