Methyl 4-bromo-2-(difluoromethyl)-3-nitropyridine-6-carboxylate
2-Bromo-4-(bromomethyl)-6-(difluoromethyl)-3-methoxypyridine
Methyl 5-bromo-3-(difluoromethyl)-4-nitropyridine-2-carboxylate
Methyl 3-bromo-5-(difluoromethyl)-2-nitropyridine-6-carboxylate