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