4-(2,3,4,5-tetrafluorophenyl)-4-oxobutyric acid

5-(2,3,4,5,6-Pentamethylphenyl)-5-oxovaleric acid

4-(5-Fluoro-2-methoxyphenyl)-4-oxobutyric acid

5-[4-(N,N-Dimethylamino)phenyl]-3-methyl-5-oxovaleric acid

3-Methyl-5-oxo-5-(4-phenoxyphenyl)valeric acid

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

2,2-Dimethyl-4-oxo-4-(2,3,4,5,6-pentamethylphenyl)butyric acid

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

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

2,2-Dimethyl-4-(4-fluoro-3-methylphenyl)-4-oxobutyric acid

5-(3-Fluoro-4-methoxyphenyl)-3-methyl-5-oxovaleric acid