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