4-[4-(N,N-Dimethylamino)phenyl]-4-oxobutyric acid

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

4-[2-Chloro-4-(methylthio)phenyl]-4-oxobutyric acid

6-(3,4,5-trichlorophenyl)-6-oxohexanoic acid

4-(2,4,5-trimethoxyphenyl)-4-oxobutyric acid

7-(2,3,4-trimethoxyphenyl)-7-oxoheptanoic acid

4-[2-(Methylthio)phenyl]-4-oxobutyric acid

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

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

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

5-(4-Ethoxyphenyl)-3-methyl-5-oxovaleric acid