6-Difluoromethoxy-2-(trifluoromethyl)nicotinic acid
5-Difluoromethoxy-4-(trifluoromethyl)picolinic acid
5-Difluoromethoxy-3-(trifluoromethyl)picolinic acid
5-Difluoromethoxy-2-(trifluoromethyl)isonicotinic acid
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