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