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