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