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