3,5-Difluoro-4'-n-pentylbenzophenone

2-chloro-3-(2-cyanobenzoyl)pyridine

2-Chloro-3-(5-ethoxycarbonyl-2-thenoyl)pyridine

5-(2-Chloro-3-pyridyl)-5-oxovaleronitrile

Ethyl 4-(6-chloropyridin-3-yl)-4-oxobutyrate

8-(2-Chloro-3-pyridyl)-8-oxooctanenitrile

2-chloro-5-(6-chlorohexanoyl)pyridine

4-(2-Thenoyl)pyridine

3-Benzoylthiophene

3-(3-methoxybenzoyl)thiophene

3-(2-thiomethylbenzoyl)thiophene