6-(2-Chloro-4-fluorophenyl)-6-oxohexanoic acid

8-(4-n-Propylphenyl)-8-oxooctanoic acid

4-(2,4,6-Trimethylphenyl)-4-oxobutyric acid

4-(4-Chloro-2-methylphenyl)-4-oxobutyric acid

3-Methyl-5-(1-naphthyl)-5-oxovaleric acid

2,2-Dimethyl-4-[2-(ethylthio)phenyl]-4-oxobutyric acid

2,2-Dimethyl-4-oxo-4-(4-n-pentylphenyl)butyric acid

2,2-Dimethyl-4-(3,5-dimethyl-4-methoxyphenyl)-4-oxobutyric acid

2,2-Dimethyl-4-(2,4-dimethylphenyl)-4-oxobutyric acid

5-(3,4-Dimethylphenyl)-3-methyl-5-oxovaleric acid

4-(2,5-Dimethoxyphenyl)-2,2-dimethyl-4-oxobutyric acid