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