2-(Chloromethyl)-6-(difluoromethyl)-3-(trifluoromethyl)pyridine-5-carboxylic acid
2-(Chloromethyl)-5-(difluoromethyl)-6-(trifluoromethyl)pyridine-3-carboxylic acid
4-(Chloromethyl)-2-(difluoromethyl)-3-(trifluoromethyl)pyridine-6-carboxylic acid
5-(Chloromethyl)-3-(difluoromethyl)-2-(trifluoromethyl)pyridine-4-carboxylic acid