Ethyl I+/--acetyl-4-cyanobenzenepropanoate

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

rac-(1R,2R,4S)-7-[4-({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)-3-hydroxybutanoyl]-7-azabicyclo[2.2.1]heptane-2-carboxylic acid

2-[2-cyclopropyl-2-({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)propanoyl]-2-azabicyclo[4.1.0]heptane-1-carboxylic acid

4-{1-[3-({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)-2-methylpropanoyl]azetidin-3-yl}butanoic acid

4-{1-[4-({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)butanoyl]azetidin-3-yl}butanoic acid

4-{1-[(2R)-2-({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)butanoyl]azetidin-3-yl}butanoic acid

4-{1-[1-({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)cyclobutanecarbonyl]azetidin-3-yl}butanoic acid

4-(1-{1-[({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)methyl]cyclopropanecarbonyl}azetidin-3-yl)butanoic acid

4-{1-[2-({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)-2-methylbutanoyl]azetidin-3-yl}butanoic acid

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