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