5-[4-(N,N-Dimethylamino)phenyl]-5-oxovaleric acid

7-(4-n-Butylphenyl)-7-oxoheptanoic acid

4-(4-tert-Butyl-2,6-dimethylphenyl)-4-oxobutyric acid

5-(2,4,5-Trimethylphenyl)-5-oxovaleric acid

5-(4-Methoxy-3-methylphenyl)-5-oxovaleric acid

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

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

2,2-Dimethyl-4-oxo-4-(2,4,5-trimethylphenyl)butyric acid

2,2-Dimethyl-4-(3-methyl-2-thienyl)-4-oxobutyric acid

2,2-Dimethyl-4-(2,3-dimethylphenyl)-4-oxobutyric acid

5-(2,4-Dimethoxyphenyl)-3-methyl-5-oxovaleric acid