6-Fluoro-3-hydroxy-4-(trifluoromethoxy)pyridine-2-carboxaldehyde
2-Fluoro-5-hydroxy-3-(trifluoromethoxy)pyridine-4-carboxaldehyde
5-Fluoro-2-methyl-3-(trifluoromethoxy)pyridine-6-sulfonyl chloride
2-Fluoro-5-hydroxy-6-(trifluoromethoxy)pyridine-3-sulfonyl chloride