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