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