3-(Difluoromethyl)-2-hydroxy-6-nitropyridine-4-sulfonyl chloride
2-(Difluoromethyl)-6-hydroxy-3-nitropyridine-4-carboxamide
2-(Difluoromethyl)-3-hydroxy-5-methylpyridine-4-methanol
3-(Difluoromethyl)-2-hydroxy-4-methylpyridine-6-carboxylic acid
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