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