3-Cyano-4-hydroxy-6-(trifluoromethoxy)pyridine-2-carbonyl chloride
3-Cyano-6-iodo-2-(trifluoromethoxy)pyridine-5-carbonyl chloride
3-Cyano-4-hydroxy-5-(trifluoromethoxy)pyridine-2-carbonyl chloride
5-Cyano-2-iodo-3-(trifluoromethoxy)pyridine-4-carbonyl chloride