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