Ethyl 2-(aminomethyl)-5-(difluoromethyl)-3-iodopyridine-6-carboxylate
Ethyl 3-amino-6-chloro-2-(difluoromethyl)pyridine-5-carboxylate
Ethyl 5-amino-2-(difluoromethyl)-3-iodopyridine-4-carboxylate
Ethyl 4-amino-5-(difluoromethyl)-3-iodopyridine-2-carboxylate