ethyl 5-(4-t-butylphenyl)-5-oxovalerate

ethyl 5-oxo-5-(4-n-propoxyphenyl)valerate

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

ethyl 8-(2,3-dimethoxyphenyl)-8-oxooctanoate

ethyl 5-(2,4-dimethoxyphenyl)-5-oxovalerate

Ethyl 4-(2-acetoxyphenyl)-4-oxobutyrate

Ethyl 4-(2-methyl-5-fluorophenyl)-4-oxobutyrate

Ethyl 6-[4-(N,N-Dimethylamino)phenyl]-6-oxohexanoate

Ethyl 6-(2-Chloro-4-fluorophenyl)-6-oxohexanoate

Ethyl 4-(2-Chloro-4-(methylthio)phenyl)-4-oxobutanoate

Ethyl 8-(2-Chloro-4-(methylthio)phenyl)-8-oxooctanoate