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