Ethyl 2-amino-4-(aminomethyl)-6-(difluoromethyl)pyridine-3-carboxylate
Ethyl 2-amino-4-(aminomethyl)-3-(difluoromethyl)pyridine-6-carboxylate
Methyl 5-amino-3-(chloromethyl)-4-(difluoromethyl)pyridine-2-carboxylate
3-Amino-4-(chloromethyl)-6-(difluoromethyl)pyridine-2-carboxaldehyde