Ethyl 8-(4-t-butylphenyl)-8-oxooctanoate

Ethyl 6-(2,4-dimethoxyphenyl)-6-oxohexanoate

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

ethyl 7-(3,4-dimethoxyphenyl)-7-oxoheptanoate

ethyl 5-(3,5-dimethoxyphenyl)-5-oxovalerate

Ethyl 6-(4-methoxy-3-nitrophenyl)-6-oxohexanoate

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

Ethyl 8-(4-Chloro-2-methoxyphenyl)-8-oxooctanoate

Ethyl 5-[2-Chloro-4-(methylthio)phenyl]-5-oxovalerate

Ethyl 5-(2-Chloro-4,5-difluorophenyl)-5-oxovalerate

Ethyl 5-(3,4,5-trichlorophenyl)-5-oxovalerate