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