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