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