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