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