Ethyl 5-oxo-6,6,6-trifluorohexanoate

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

ethyl 5-oxo-5-(2-trifluoromethylphenyl)valerate

ethyl 8-oxo-8-(3-trifluoromethylphenyl)octanoate

ethyl 8-(2,4-dichlorophenyl)-8-oxooctanoate

Ethyl 8-(4-isopropylphenyl)-8-oxooctanoate

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

ethyl 8-(2-ethoxyphenyl)-8-oxooctanoate

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

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

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