Methyl 2-cyano-5-(difluoromethyl)-4-nitropyridine-3-carboxylate
3-(Difluoromethyl)-5-methylpyridine-4-sulfonyl chloride
2-(Difluoromethyl)-4-nitropyridine-3-sulfonyl chloride
3-Iodo-6-methyl-2-(trifluoromethyl)pyridine
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