4-Chloro-3-(difluoromethyl)-6-nitropyridine-2-acetic acid
4-Cyano-2-(difluoromethyl)-3-fluoro-6-nitropyridine
6-Chloro-3-(difluoromethyl)-2-nitropyridine-4-acetic acid
3-Cyano-5-(difluoromethyl)-2-fluoro-6-nitropyridine
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