4-(2,2-dimethylpropyl)-5-ethyl-4H-1,2,4-triazole-3-sulfonyl chloride

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

(2RS,3RS)-3-({[(1RS&,2SR&)-2-({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)cyclopentyl]formamido}methyl)oxolane-2-carboxylic acid

3-[2-({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)-5-methylhexanamido]-2,2-difluoropropanoic acid

1-[2-({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)-5-methylhexanoyl]-2-methylpyrrolidine-2-carboxylic acid

1-[2-({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)-N,5-dimethylhexanamido]cyclobutane-1-carboxylic acid

3-({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)-4-oxo-4-{9-thia-3-azabicyclo[4.2.1]nonan-3-yl}butanoic acid

4-[(2,2-dimethylhex-5-en-1-yl)carbamoyl]-4-({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)butanoic acid

3-[(2,2-dimethylhex-5-en-1-yl)carbamoyl]-3-({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)propanoic acid

3-({5-[({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)methyl]oxolan-3-yl}formamido)-2-methylbutanoic acid

(2R)-2-({5-[({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)methyl]oxolan-3-yl}formamido)pentanoic acid