2-Bromo-6-nitro-3-(trifluoromethoxy)pyridine-4-sulfonyl chloride
2-Chloro-6-fluoro-3-(fluoromethyl)-5-(trifluoromethoxy)pyridine
2-Bromo-5-nitro-3-(trifluoromethoxy)pyridine-4-sulfonyl chloride
6-Chloro-3-fluoro-2-(fluoromethyl)-4-(trifluoromethoxy)pyridine