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