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