4-Fluoro-6-hydroxy-2-(trifluoromethoxy)pyridine-3-carboxylic acid
4-Fluoro-2-hydroxy-5-(trifluoromethoxy)pyridine-3-carboxylic acid
6-Hydroxy-2-methoxy-3-methyl-4-(trifluoromethoxy)pyridine
3-Fluoro-5-(fluoromethyl)-4-hydroxy-2-(trifluoromethoxy)pyridine