3-Bromo-5-(difluoromethyl)-2-nitropyridine-4-carbonyl chloride
5-Bromo-3-(difluoromethyl)-2-nitro-4-(trifluoromethyl)pyridine
5-Bromo-3-(difluoromethyl)-4-nitro-2-(trifluoromethyl)pyridine
3-Bromo-5-(difluoromethyl)-2-nitro-6-(trifluoromethyl)pyridine