Ethyl 3-bromo-2-(bromomethyl)-5-(difluoromethyl)pyridine-4-acetate
Ethyl 3-bromo-2-(bromomethyl)-4-(difluoromethyl)pyridine-5-acetate
Ethyl 2-bromo-6-(bromomethyl)-5-(difluoromethyl)pyridine-3-acetate
Ethyl 2-bromo-6-(bromomethyl)-4-(difluoromethyl)pyridine-3-acetate