3-Bromo-2-methoxy-6-(trifluoromethoxy)pyridine-5-sulfonyl chloride
3-Bromo-6-iodo-4-(trifluoromethoxy)pyridine-2-sulfonyl chloride
3-Bromo-5-(chloromethyl)-6-nitro-2-(trifluoromethoxy)pyridine
4-Bromo-5-iodo-3-(trifluoromethoxy)pyridine-2-sulfonyl chloride