Methyl 3-chloro-4-cyano-2-(difluoromethyl)pyridine-5-carboxylate
Methyl 6-chloro-4-cyano-3-(difluoromethyl)pyridine-2-carboxylate
4-Chloro-5-cyano-3-(difluoromethyl)pyridine-2-carboxylic acid
2-(Aminomethyl)-3-bromo-4-(difluoromethyl)pyridine-6-carboxylic acid