Methyl 3-bromo-4-nitro-2-(trifluoromethoxy)pyridine-5-carboxylate
Methyl 3-bromo-2-nitro-4-(trifluoromethoxy)pyridine-5-carboxylate
Methyl 2-bromo-5-nitro-3-(trifluoromethoxy)pyridine-4-carboxylate
Methyl 2-bromo-3-nitro-4-(trifluoromethoxy)pyridine-5-carboxylate