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