5-Fluoro-2-hydroxy-3-(trifluoromethoxy)pyridine-4-carboxylic acid
2-Fluoro-3-iodo-6-methyl-4-(trifluoromethoxy)pyridine
4-Fluoro-6-hydroxy-3-(trifluoromethoxy)pyridine-2-carboxylic acid
5-Fluoro-3-hydroxy-4-(trifluoromethoxy)pyridine-2-carboxylic acid