1-(2-(Bromomethyl)-4-(trifluoromethylthio)phenyl)propan-2-one

2-(cyclopropylmethyl)-3-[(2R)-2-({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)propanamido]propanoic acid

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

2-(cyclopropylmethyl)-3-[4-({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)-2-methylbutanamido]propanoic acid

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

3-[2-({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)-4-methoxy-4-methylpentanamido]-2-methylbutanoic acid

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

3-[benzyl(methyl)amino]-2-({1-[2-({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)ethyl]-1H-imidazol-4-yl}formamido)propanoic acid

3-[benzyl(methyl)amino]-2-[2-({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)-2-(1-methyl-1H-pyrazol-4-yl)acetamido]propanoic acid

1-[3-(dimethylamino)-2-({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)propanoyl]-5-methylpiperidine-3-carboxylic acid

2-(1-{3-[benzyl(methyl)amino]-2-({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)propanoyl}azetidin-3-yl)acetic acid