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