Ethyl 2-(difluoromethyl)-5-fluoro-4-nitropyridine-3-carboxylate
Ethyl 6-(difluoromethyl)-4-fluoro-2-nitropyridine-3-carboxylate
Methyl 5-(difluoromethyl)-4-fluoro-2-nitropyridine-3-carboxylate
3-(Bromomethyl)-4-(difluoromethyl)-2-fluoropyridine-6-carboxylic acid