4-Cyano-2-hydroxy-3-(trifluoromethoxy)pyridine-6-sulfonyl chloride
6-Cyano-2-(fluoromethyl)-4-iodo-3-(trifluoromethoxy)pyridine
3-Cyano-4-hydroxy-2-(trifluoromethoxy)pyridine-6-sulfonyl chloride
2-Cyano-6-(fluoromethyl)-3-iodo-4-(trifluoromethoxy)pyridine