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