Methyl 4-(trifluoromethyl)piperidine-4-carboxylate

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

3-[(2S)-2-({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)-N,4-dimethylpentanamido]cyclobutane-1-carboxylic acid

3-{2-[2-({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)acetamido]-N-methylacetamido}cyclobutane-1-carboxylic acid

3-[6-({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)hexanamido]cyclobutane-1-carboxylic acid

1-benzyl-3-[2-({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)-4-(methylsulfanyl)butanamido]pyrrolidine-3-carboxylic acid

rac-(1R,2S)-2-[4-({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)-2,2-dimethylbutanamido]cyclopentane-1-carboxylic acid

rac-(1R,2S)-2-[5-({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)-3-methylpentanamido]cyclopentane-1-carboxylic acid

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

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

(1RS,2SR)-2-[(2R)-2-({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)-3-methylbutanamido]cyclopentane-1-carboxylic acid