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