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