5-Bromo-2-nitro-3-(trifluoromethoxy)pyridine-6-carbonyl chloride
6-Bromo-2-nitro-4-(trifluoromethoxy)pyridine-3-carbonyl chloride
4-Bromo-5-nitro-3-(trifluoromethoxy)pyridine-2-carbonyl chloride
4-Bromo-3-nitro-2-(trifluoromethoxy)pyridine-6-carbonyl chloride