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