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