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