3-Chloro-6-(difluoromethyl)-4-nitropyridine-2-carbonyl chloride
3-Chloro-4-(difluoromethyl)-2-nitropyridine-5-carbonyl chloride
3-Chloro-2-(difluoromethyl)-4-nitropyridine-5-carbonyl chloride
3-Cyano-2-(difluoromethyl)-6-hydroxypyridine-4-carboxylic acid