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