4-(3-Nitrophenyl)-4-oxo-2-(propan-2-yl)butanoic acid

2-(1-{2-[({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)methyl]cyclopropyl}-N-(prop-2-en-1-yl)formamido)acetic acid

2-({2-[({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)methyl]cyclopropyl}formamido)pent-4-enoic acid

5-[2-({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)pentanoyl]-5-azaspiro[2.4]heptane-7-carboxylic acid

3-cyclopentyl-3-[(3R)-3-({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)butanamido]propanoic acid

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

3-({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)-3-{[(6-oxo-1,6-dihydropyridin-3-yl)methyl]carbamoyl}propanoic acid

4-{[1-benzyl-3-({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)pyrrolidin-3-yl]formamido}-2-methylbut-2-enoic acid

2-({[3-({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)-2,6-difluorophenyl]formamido}oxy)propanoic acid

1-{2-[2-({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)-1,3-thiazol-4-yl]acetyl}-3,3-dimethylazetidine-2-carboxylic acid

tert-butyl (4aS,7S,7aR)-7-(hydroxymethyl)-1,3,4,4a,5,6,7,7a-octahydrocyclopenta[c]pyridine-2-carboxylate