Ethyl 5-bromo-2-cyano-3-(trifluoromethoxy)pyridine-4-carboxylate
3-Bromo-2-cyano-6-(trifluoromethoxy)pyridine-5-sulfonyl chloride
Ethyl 3-bromo-5-cyano-2-(trifluoromethoxy)pyridine-4-carboxylate
3-Bromo-2-cyano-5-(trifluoromethoxy)pyridine-4-sulfonyl chloride