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