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