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