4-Chloro-3-hydroxy-6-(trifluoromethoxy)pyridine-2-carboxylic acid
4-Chloro-3-hydroxy-2-(trifluoromethoxy)pyridine-6-carboxylic acid
4-Chloro-2-hydroxy-6-(trifluoromethoxy)pyridine-3-carboxylic acid
3-Cyano-6-hydroxy-2-(trifluoromethoxy)pyridine-5-acetic acid