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