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