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

4-oxo-4-(4-n-pentylphenyl)butyric acid

8-(4-hexylphenyl)-8-oxooctanoic acid

6-(4-Ethoxyphenyl)-6-oxohexanoic acid

5-oxo-5-(4-n-propoxyphenyl)valeric acid

4-(4-hexyloxyphenyl)-4-oxobutyric acid

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

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

8-(2,5-Dimethoxyphenyl)-8-oxooctanoic acid

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

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

8-[4-(N,N-Diethylamino)phenyl]-8-oxooctanoic acid

8-(4-Chloro-2-fluorophenyl)-8-oxooctanoic acid

7-(4-Chloro-2-methoxyphenyl)-7-oxoheptanoic acid

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