4-(2,4-Dichlorophenyl)-4-oxobutyric acid

6-(2,5-dichlorophenyl)-6-oxohexanoic acid

8-(4-ethylphenyl)-8-oxooctanoic acid

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

7-oxo-7-(4-n-propoxyphenyl)heptanoic acid

5-(4-hexyloxyphenyl)-5-oxovaleric acid

6-(4-heptyloxyphenyl)-6-oxohexanoic acid

4-(2,6-Dimethoxyphenyl)-4-oxobutyric acid

8-(3,4-Dimethoxyphenyl)-8-oxooctanoic acid

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

7-[4-(N,N-Diethylamino)phenyl]-7-oxoheptanoic acid