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