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