7-Bromo-2,2-dimethyl-4H-benzo[d][1,3]dioxin-4-one

2-{1-[2-({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)-1,3-thiazol-5-yl]-N-methylformamido}acetic acid

3-{[2-({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)-1,3-thiazol-5-yl]formamido}butanoic acid

rac-(2R,3S)-3-[4-({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)-2-methylbutanamido]oxolane-2-carboxylic acid

1-[1-({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)cyclopropanecarbonyl]pyrrolidine-3-carboxylic acid

(2RS,3SR)-3-[(2R)-2-({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)pentanamido]oxolane-2-carboxylic acid

rac-(2R,3S)-3-{1-[({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)methyl]cyclopentaneamido}oxolane-2-carboxylic acid

4-[2-({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)-3,3,3-trifluoropropanamido]pentanoic acid

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

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

2-[2-({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)-3,3,3-trifluoropropanoyl]-4-methyl-2-azabicyclo[2.1.1]hexane-1-carboxylic acid