5-(Difluoromethyl)-2-methoxy-4-nitropyridine-3-sulfonyl chloride
5-(Difluoromethyl)-3-hydroxy-4-iodopyridine-2-sulfonyl chloride
3-Cyano-5-(difluoromethyl)-4-fluoropyridine-2-methanol
3-Bromo-4-methyl-2-(trifluoromethoxy)pyridine-5-sulfonyl chloride
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