Methyl 4-bromo-5-nitro-2-(trifluoromethoxy)pyridine-3-acetate
Methyl 2-bromo-3-(bromomethyl)-5-(trifluoromethoxy)pyridine-6-acetate
Methyl 3-bromo-4-nitro-6-(trifluoromethoxy)pyridine-2-acetate
Methyl 3-bromo-2-nitro-6-(trifluoromethoxy)pyridine-4-acetate