6-(Difluoromethyl)-4-nitro-2-(trifluoromethyl)pyridine-3-sulfonyl chloride
2-(Difluoromethyl)-3-hydroxy-5-nitropyridine-6-sulfonamide
2-Bromo-5-fluoro-6-(trifluoromethoxy)pyridine-3-sulfonamide
3-Nitro-5-(trifluoromethoxy)pyridine-4-carboxamide
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