(2R)-2-amino-3-(1,5-dimethyl-1H-pyrazol-3-yl)propanoic acid

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

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

2-({2-[2-({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)acetamido]acetamido}methyl)-1,3-thiazole-4-carboxylic acid

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

(3S)-1-[3-({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)-2,2,3-trimethylbutanoyl]piperidine-3-carboxylic acid

2-{1-[2-({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)-5-methylphenyl]-N-(prop-2-en-1-yl)formamido}acetic acid

(2R)-1-(2-{1-[({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)methyl]cyclobutyl}acetyl)piperidine-2-carboxylic acid

5-[6-({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)hexanamido]-3-methyl-1,2-thiazole-4-carboxylic acid

2-[1-({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)cyclobutaneamido]-5-iodobenzoic acid

2-[4-({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)-3-methoxy-N-(2,2,2-trifluoroethyl)butanamido]acetic acid