Methyl 3-bromo-5-chloro-6-(difluoromethyl)pyridine-2-carboxylate
Methyl 3-bromo-2-chloro-5-(difluoromethyl)pyridine-6-carboxylate
Methyl 3-bromo-2-chloro-4-(difluoromethyl)pyridine-5-carboxylate
Methyl 3-bromo-5-chloro-2-(difluoromethyl)pyridine-6-carboxylate