3-Hydroxy-2-iodo-4-(trifluoromethoxy)pyridine-5-sulfonyl chloride
2-Fluoro-3-hydroxy-5-(trifluoromethoxy)-4-(trifluoromethyl)pyridine
2-Hydroxy-6-iodo-3-(trifluoromethoxy)pyridine-4-sulfonyl chloride
3-Fluoro-2-hydroxy-4-methyl-5-(trifluoromethoxy)pyridine