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