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