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

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

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

5-oxo-5-(4-pentyloxyphenyl)valeric acid

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

8-(2,3-Dimethoxyphenyl)-8-oxooctanoic acid

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

8-(2,6-Dimethoxyphenyl)-8-oxooctanoic acid

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

5-[4-(N,N-Diethylamino)phenyl]-5-oxovaleric acid

5-[4-(N,N-Dimethylamino)phenyl]-5-oxovaleric acid