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