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