2-Hydroxy-3-(trifluoromethoxy)-6-(trifluoromethyl)pyridine-4-carboxylic acid
2-Hydroxy-6-(trifluoromethoxy)-4-(trifluoromethyl)pyridine-3-carboxylic acid
2-Hydroxy-3-(trifluoromethoxy)-4-(trifluoromethyl)pyridine-6-carboxylic acid
2-Hydroxy-5-(trifluoromethoxy)-6-(trifluoromethyl)pyridine-3-carboxylic acid