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