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