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