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