3-Bromo-2-hydroxy-4-(trifluoromethoxy)pyridine-5-sulfonyl chloride
4-(Aminomethyl)-2-bromo-3-iodo-6-(trifluoromethoxy)pyridine
2-Bromo-6-hydroxy-3-(trifluoromethoxy)pyridine-4-sulfonyl chloride
2-Bromo-3-(fluoromethyl)-6-iodo-4-(trifluoromethoxy)pyridine