3-Amino-5-(piperazin-1-yl)benzoic acid

6-{[3-({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)cyclopentyl]formamido}-4-methylhexanoic acid

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

1-[2-({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)cyclohexanecarbonyl]-2-methylpyrrolidine-3-carboxylic acid

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

(2R)-2-[3-cyclopropyl-3-({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)propanamido]-4-methoxy-4-oxobutanoic acid

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

4-{4-azatricyclo[5.2.1.0,2,6]decan-4-yl}-3-({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)-4-oxobutanoic acid

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

6-{[2-({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)cyclopentyl]formamido}hexanoic acid

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