6-Amino-2-cyano-4-(difluoromethyl)pyridine-3-carboxaldehyde
Methyl 5-amino-3-cyano-2-(difluoromethyl)pyridine-4-carboxylate
Methyl 3-amino-5-cyano-4-(difluoromethyl)pyridine-2-carboxylate
Methyl 5-amino-4-cyano-2-(difluoromethyl)pyridine-3-carboxylate