3-Bromo-2-chloro-5-(trifluoromethoxy)pyridine-6-sulfonyl chloride
3-Amino-2-(chloromethyl)-5-iodo-6-(trifluoromethoxy)pyridine
3-Bromo-2-chloro-4-(trifluoromethoxy)pyridine-5-sulfonyl chloride
3-Amino-2-(chloromethyl)-4-iodo-5-(trifluoromethoxy)pyridine