2-Difluoromethoxy-5-fluoro-3-pyridinecarboxylic acid
6-Difluoromethoxy-3-fluoro-2-pyridinecarboxylic acid
2-Difluoromethoxy-3-fluoro-6-pyridinecarboxylic acid
3-Chloro-6-(difluoromethoxy)picolinic acid
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