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