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