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