Ethyl 4-(1-naphthyl)-4-oxobutyrate

Ethyl 6-cyclopropyl-6-oxohexanoate

Ethyl 4-oxooctanoate

Ethyl 4-oxononanoate

Ethyl 7-oxodecanoate

Ethyl 5-oxooctanoate

Ethyl 4-oxo-4-(4-pyridyl)butyrate

Ethyl 4-propionylbenzoate

ethyl 4-(3,5-dimethylphenyl)-2-methyl-4-oxobutyrate

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

ethyl 7-(4-bromo-2-methylphenyl)-7-oxoheptanoate