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