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