Ethyl 4-(2,6-difluorophenyl)-4-oxobutyrate

Ethyl 8-cyclopentyl-8-oxooctanoate

ethyl 8,8-dimethyl-7-oxononanoate

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