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