Diethyl(phenylimino)-lambda6-sulfanone

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

2-{3-[2-({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)-3,3,3-trifluoropropanamido]cyclobutyl}acetic acid

2-{3-[3-({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)furan-2-amido]cyclobutyl}acetic acid

2-{3-[2-({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)hex-5-enamido]cyclobutyl}acetic acid

rac-2-(3-{2-[(1R,2S)-2-({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)cyclopentyl]acetamido}cyclobutyl)acetic acid

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

5-[4-({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)cyclopent-1-ene-1-carbonyl]-5-azaspiro[2.4]heptane-7-carboxylic acid

3-(1-{2-[3-({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)cyclobutyl]acetyl}pyrrolidin-3-yl)propanoic acid

2-ethyl-1-{2-[3-({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)cyclobutyl]acetyl}pyrrolidine-2-carboxylic acid

3-ethyl-1-{2-[3-({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)cyclobutyl]acetyl}pyrrolidine-3-carboxylic acid