Ethyl 2-bromo-3-(difluoromethyl)-4-(trifluoromethyl)pyridine-6-carboxylate
Methyl 3-bromo-6-(difluoromethyl)-2-(trifluoromethyl)pyridine-4-carboxylate
4-Chloro-3-cyano-2-(difluoromethyl)-5-nitropyridine
4-Chloro-2-cyano-6-(difluoromethyl)-3-nitropyridine