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