4-(3-Bromo-5-methylphenyl)-4-oxobutyric acid

6-(2,3-Dichlorophenyl)-6-oxohexanoic acid

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

6-oxo-6-(4-n-pentylphenyl)hexanoic acid

8-(4-ethoxyphenyl)-8-oxooctanoic acid

8-oxo-8-(4-n-propoxyphenyl)octanoic acid

6-oxo-6-(4-pentyloxyphenyl)hexanoic acid

8-(4-heptyloxyphenyl)-8-oxooctanoic acid

6-(2,6-Dimethoxyphenyl)-6-oxohexanoic acid

4-[3-(N,N-Dimethylamino)phenyl]-4-oxobutyric acid

7-[3-(N,N-Dimethylamino)phenyl]-7-oxoheptanoic acid