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