Ethyl 4-(bromomethyl)-3-(difluoromethyl)-2-methoxypyridine-5-acetate
Ethyl 4-(bromomethyl)-6-(difluoromethyl)-2-methoxypyridine-3-acetate
Ethyl 4-(bromomethyl)-2-(difluoromethyl)-6-methoxypyridine-3-acetate
Ethyl 3-(chloromethyl)-5-(difluoromethyl)-2-methylpyridine-6-acetate