7-Methoxy-2-(trifluoromethyl)pyrazolo[1,5-A]pyridine-3-carboxylic acid

4-[3-(dimethylamino)-2-({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)propanamido]-3,3-dimethylbutanoic acid

4-[3-({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)-3-methylbutanamido]-3,3-dimethylbutanoic acid

5-[N-ethyl-4-({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)-3-hydroxybutanamido]pentanoic acid

(2S,3R)-2-[4-({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)pentanamido]-3-methoxybutanoic acid

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

3-{2-[({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)methyl]-3,3,3-trifluoro-N-(propan-2-yl)propanamido}propanoic acid

4-(dimethylamino)-2-(2-{[2-({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)ethyl]sulfanyl}acetamido)butanoic acid

(2R)-2-[(2S)-3-(dimethylamino)-2-({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)propanamido]pentanoic acid

3-[(2-cyclobutyl-2-methylpropyl)carbamoyl]-3-({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)propanoic acid

2-{1-[2-({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)benzamido]cyclobutyl}acetic acid