5-Cyano-2-fluoro-3-(trifluoromethoxy)pyridine-6-sulfonyl chloride
4-Cyano-3-fluoro-6-(trifluoromethoxy)pyridine-2-sulfonyl chloride
2-Fluoro-6-methoxy-4-(trifluoromethoxy)pyridine-3-methanol
4-Cyano-3-fluoro-2-(trifluoromethoxy)pyridine-6-sulfonyl chloride