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