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