3-Bromo-2-(difluoromethyl)-5-nitropyridine-6-carboxylic acid
3-Chloro-2-cyano-6-(difluoromethyl)-4-methylpyridine
3-Chloro-2-cyano-5-(difluoromethyl)-4-methylpyridine
3-Bromo-2-(difluoromethyl)-4-nitropyridine-6-carboxylic acid
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