6-Cyano-2-(difluoromethyl)-3-fluoro-4-(trifluoromethoxy)pyridine
6-Chloro-3-fluoro-2-(trifluoromethoxy)pyridine-4-sulfonyl chloride
2-Cyano-3-(difluoromethyl)-5-fluoro-4-(trifluoromethoxy)pyridine
2-Chloro-5-fluoro-3-(trifluoromethoxy)pyridine-6-sulfonyl chloride