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