6-(4-Ethylphenyl)-6-oxohexanoic acid

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

7-Oxo-7-(4-isopropoxyphenyl)heptanoic acid

4-(4-heptyloxyphenyl)-4-oxobutyric acid

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

7-(3,4-Dimethoxyphenyl)-7-oxoheptanoic acid

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

8-[3-(N,N-Dimethylamino)phenyl]-8-oxooctanoic acid

5-(2-Chloro-4-fluorophenyl)-5-oxovaleric acid

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

6-(2-Chloro-6-fluorophenyl)-6-oxohexanoic acid