ethyl 4-(3,4-difluorophenyl)-2,2-dimethyl-4-oxobutyrate

ethyl 8-oxotridecanoate

Ethyl 5-oxooctanoate

Ethyl 4-(1-oxo-2-phenylethyl)benzoate

ethyl 6-(3,4-dichlorophenyl)-6-oxohexanoate

Ethyl 4-(3-bromo-5-methylphenyl)-4-oxobutyrate

Ethyl 4-(2-iodophenyl)-4-oxobutyrate

Ethyl 8-(4-iodophenyl)-8-oxooctanoate

ethyl 7-(4-nitrophenyl)-7-oxoheptanoate

Ethyl 5-oxo-5-(4-trifluoromethylphenyl)valerate

ethyl 6-(2,3-dichlorophenyl)-6-oxohexanoate