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