4-(1-Oxo-2-phenylethyl)benzoic acid

6-(4-hexylphenyl)-6-oxohexanoic acid

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

5-oxo-5-(4-n-propoxyphenyl)valeric acid

7-oxo-7-(4-pentyloxyphenyl)heptanoic acid

5-(2,3-Dimethoxyphenyl)-5-oxovaleric acid

6-(4-heptyloxyphenyl)-6-oxohexanoic acid

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

5-(2,5-Dimethoxyphenyl)-5-oxovaleric acid

5-(3,5-Dimethoxyphenyl)-5-oxovaleric acid

7-[4-(N,N-Dimethylamino)phenyl]-7-oxoheptanoic acid