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