Methyl 2-cyano-3-hydroxy-6-(trifluoromethoxy)pyridine-4-carboxylate
3-Cyano-6-hydroxy-2-(trifluoromethoxy)pyridine-5-carboxylic acid
4-Fluoro-3-methyl-2-(trifluoromethoxy)pyridine-6-acetic acid
6-Cyano-3-hydroxy-4-(trifluoromethoxy)pyridine-2-acetic acid