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