4-Bromo-6-chloro-3-(trifluoromethoxy)pyridine-2-carboxylic acid
4-Bromo-3-chloro-2-(trifluoromethoxy)pyridine-6-sulfonyl chloride
4-Bromo-2-chloro-3-(trifluoromethoxy)pyridine-5-carboxylic acid
3-Bromo-5-chloro-6-(trifluoromethoxy)pyridine-2-sulfonyl chloride