Methyl 3-bromo-6-cyano-4-(difluoromethyl)pyridine-2-carboxylate
2-Bromo-3-cyano-6-(difluoromethyl)pyridine-5-carboxylic acid
Methyl 4-bromo-6-cyano-3-(difluoromethyl)pyridine-2-carboxylate
Methyl 4-bromo-3-cyano-2-(difluoromethyl)pyridine-6-carboxylate