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