Ethyl 8-oxo-8-(4-trifluoromethylphenyl)octanoate

ethyl 5-(4-ethylphenyl)-5-oxovalerate

ethyl 4-(4-t-butylphenyl)-4-oxobutyrate

ethyl 6-(4-t-butylphenyl)-6-oxohexanoate

ethyl 7-(4-hexylphenyl)-7-oxoheptanoate

ethyl 6-(2-ethoxyphenyl)-6-oxohexanoate

Ethyl 6-oxo-6-(4-n-propoxyphenyl)hexanoate

ethyl 5-(4-hexyloxyphenyl)-5-oxovalerate

ethyl 4-(2,3-dimethoxyphenyl)-4-oxobutyrate

ethyl 5-(2,5-dimethoxyphenyl)-5-oxovalerate

ethyl 5-(2,6-dimethoxyphenyl)-5-oxovalerate

Ethyl 4-(4-methoxy-3-nitrophenyl)-4-oxobutyrate

Ethyl 5-(2-acetoxyphenyl)-5-oxovalerate

Ethyl 5-[4-(N,N-Dimethylamino)phenyl]-5-oxovalerate

Ethyl 4-(2-Chloro-4-fluorophenyl)-4-oxobutanoate