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