4-Chloro-2-cyano-3-(difluoromethyl)pyridine-5-acetonitrile
3-Chloro-5-cyano-6-(difluoromethyl)pyridine-2-acetonitrile
2-Bromo-3-(difluoromethyl)-5-nitropyridine-6-sulfonyl chloride
Ethyl 6-bromo-2-(difluoromethyl)-3-(trifluoromethyl)pyridine-4-acetate