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