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