3-Chloro-4-hydroxy-6-nitro-2-(trifluoromethoxy)pyridine
3-Cyano-4-(difluoromethyl)-2-iodopyridine-5-carboxylic acid
6-(Difluoromethyl)-4-nitro-2-(trifluoromethyl)pyridine-3-sulfonyl chloride
2-(Difluoromethyl)-3-hydroxy-5-nitropyridine-6-sulfonamide
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