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