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

4-(4-Chloro-2-methoxyphenyl)-4-oxobutyric acid

8-[2-Chloro-4-(methylthio)phenyl]-8-oxooctanoic acid

4-(2,3,4,5-tetrafluorophenyl)-4-oxobutyric acid