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