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