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