(2S)-1-[(2-methyl-2H-1,2,3,4-tetrazol-5-yl)methyl]pyrrolidine-2-carboxylic acid hydrochloride

3-{2-[1-({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)cyclopentyl]acetamido}-2-hydroxy-2-methylpropanoic acid

2-{1-[4-({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)-3-methyloxolan-3-yl]-N-propylformamido}acetic acid

2-{4-[3-({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)-3-methylbutanamido]-1H-pyrazol-1-yl}acetic acid

2-cyclopropyl-2-{[2-({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)cyclohexyl]formamido}acetic acid

3-(1-{1-[2-({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)ethyl]-1H-1,2,3-triazol-4-yl}-N-methylformamido)propanoic acid

2-[(2S)-2-({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)-4-(methylsulfanyl)butanamido]cyclopentane-1-carboxylic acid

3-{[2-({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)-4-methyl-1,3-thiazol-5-yl]formamido}-3-methylbutanoic acid

3-{[3-({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)cyclohexyl]formamido}-3-methylbutanoic acid

2-({1-[2-({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)ethyl]-1H-1,2,3-triazol-4-yl}formamido)butanoic acid

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