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