2-{[4-(Aminomethyl)piperidin-1-yl]sulfonyl}acetic acid

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

2-[3-cyclopropyl-N-(cyclopropylmethyl)-2-({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)propanamido]acetic acid

2-[(2S)-3-cyclopropyl-N-(cyclopropylmethyl)-2-({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)propanamido]acetic acid

3-{2-[3-({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)hexanamido]ethoxy}propanoic acid

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

2-{1-[4-({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)-2,2-dimethylbutanoyl]pyrrolidin-2-yl}acetic acid

2-ethyl-3-[3-({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)-2,2-difluoropropanoyl]-1,3-thiazolidine-4-carboxylic acid

9H-fluoren-9-ylmethyl N-(2-methylpropyl)-N-[1-(1,2,3,4-tetrahydroisoquinolin-5-yl)propyl]carbamate

3-{[5-({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)-2-fluorophenyl]formamido}-2-methylpropanoic acid

4-[(2S)-2-({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)-N-phenylpropanamido]butanoic acid