2-(Difluoromethyl)-6-hydroxy-3-methylpyridine-4-sulfonyl chloride
5-(Difluoromethyl)-4-hydroxy-2-iodopyridine-3-sulfonyl chloride
2-(Difluoromethyl)-3-hydroxy-5-methoxy-4-nitropyridine
4-(Difluoromethyl)-5-hydroxy-2-methoxy-3-methylpyridine
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