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