ethyl 5-oxo-5-(4-phenoxyphenyl)valerate

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

ethyl 6-(2,6-difluorophenyl)-6-oxohexanoate

ethyl 7-(2-fluorophenyl)-7-oxoheptanoate

Ethyl 4-(2-fluorophenyl)-4-oxobutyrate

ethyl 7-(4-biphenyl)-7-oxoheptanoate

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

Ethyl 5-cyclopentyl-5-oxovalerate

Ethyl 6-cyclobutyl-6-oxohexanoate

Ethyl 4-cyclopropyl-4-oxobutyrate

Ethyl 6,6-dimethyl-5-oxoheptanoate