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