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