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