2-Bromo-5-methyl-3-(trifluoromethoxy)pyridine-6-sulfonyl chloride
2-Chloro-5-(fluoromethyl)-3-iodo-4-(trifluoromethoxy)pyridine
2-Bromo-4-methyl-6-(trifluoromethoxy)pyridine-3-sulfonyl chloride
2-Chloro-4-(fluoromethyl)-3-iodo-5-(trifluoromethoxy)pyridine