2-(Difluoromethyl)-3-iodopyridine-4-sulfonamide
3-(Chloromethyl)-4-(difluoromethyl)pyridine-5-carboxylic acid
4-(Difluoromethyl)-3-iodopyridine-2-sulfonyl chloride
2-(Chloromethyl)-6-(difluoromethyl)pyridine-4-carboxylic acid
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