Ethyl 4-chloro-3-(difluoromethyl)-2-iodopyridine-5-carboxylate
Ethyl 3-chloro-5-(difluoromethyl)-2-iodopyridine-4-carboxylate
Ethyl 3-chloro-4-(difluoromethyl)-2-iodopyridine-5-carboxylate
5-Chloro-4-(chloromethyl)-2-(difluoromethyl)pyridine-3-carboxylic acid