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

7-(5-Chloro-2-methoxyphenyl)-7-oxoheptanoic acid

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

5-(2-Chloro-4,5-difluorophenyl)-5-oxovaleric acid

6-(3,4,5-trichlorophenyl)-6-oxohexanoic acid

8-(2,3,4,5-tetrafluorophenyl)-8-oxooctanoic acid

7-(3,4,5-trimethoxyphenyl)-7-oxoheptanoic acid

6-(4-n-Propylphenyl)-6-oxohexanoic acid

8-(4-n-Propylphenyl)-8-oxooctanoic acid

5-(3-Methyl-2-thienyl)-5-oxovaleric acid

5-(2,4,5-Trimethylphenyl)-5-oxovaleric acid