4-(2-Ethoxyphenyl)-4-oxobutyric acid

8-(4-hexyloxyphenyl)-8-oxooctanoic acid

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

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

7-(3,5-Dimethoxyphenyl)-7-oxoheptanoic acid

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

6-[3-(N,N-Dimethylamino)phenyl]-6-oxohexanoic acid

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

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

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

5-(2-Chloro-4-(methylthio)phenyl)-5-oxovaleric acid