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