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