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

4-(4-n-Butylphenyl)-2,2-dimethyl-4-oxobutyric acid

5-(4-tert-Butyl-3,5-dimethylphenyl)-3-methyl-5-oxovaleric acid

3-Methyl-5-oxo-5-(2,3,5,6-tetramethylphenyl)valeric acid

2,2-Dimethyl-4-[3,4-(methylenedioxy)phenyl]-4-oxobutyric acid

2,2-Dimethyl-4-(2,6-dimethylphenyl)-4-oxobutyric acid

5-(2,5-Dimethylphenyl)-3-methyl-5-oxovaleric acid

4-(3,5-Dimethoxyphenyl)-2,2-dimethyl-4-oxobutyric acid

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

5-(4-Methoxy-2-methylphenyl)-3-methyl-5-oxovaleric acid

5-(3-Chloro-4-methylphenyl)-3-methyl-5-oxovaleric acid