5-Bromo-3-((methylthio)methyl)-1,2,4-oxadiazole

2-[(1-{1-[({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)methyl]cyclobutanecarbonyl}azetidin-3-yl)oxy]acetic acid

2-({1-[6-({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)hexanoyl]azetidin-3-yl}oxy)acetic acid

2-(2-{3-[({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)methyl]cyclobutyl}-N-[2-(methylsulfanyl)ethyl]acetamido)acetic acid

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

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

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

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

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

(3S)-3-{[3-({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)phenyl]formamido}pentanoic acid

(3R)-3-{2-[({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)methyl]-4-methylpentanamido}pentanoic acid