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