2-Bromo-3-nitro-5-(trifluoromethoxy)pyridine-6-sulfonyl chloride
Methyl 4-bromo-5-(chloromethyl)-2-(trifluoromethoxy)pyridine-3-carboxylate
2-Bromo-3-nitro-4-(trifluoromethoxy)pyridine-5-sulfonyl chloride
Methyl 4-bromo-3-(chloromethyl)-5-(trifluoromethoxy)pyridine-2-carboxylate