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