2-Bromo-3-chloro-4-(trifluoromethoxy)pyridine-6-carbonyl chloride
3,5-Dimethoxy-4-(trifluoromethoxy)pyridine-2-carbonyl chloride
3,5-Dimethoxy-2-(trifluoromethoxy)pyridine-4-carbonyl chloride
3,4-Dimethoxy-6-(trifluoromethoxy)pyridine-2-carbonyl chloride