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