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