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