2-Bromo-6-hydroxy-3-(trifluoromethoxy)pyridine-4-sulfonyl chloride
2-Bromo-3-(fluoromethyl)-6-iodo-4-(trifluoromethoxy)pyridine
6-Bromo-3-hydroxy-4-(trifluoromethoxy)pyridine-2-sulfonyl chloride
4-Bromo-2-(chloromethyl)-6-iodo-3-(trifluoromethoxy)pyridine