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