3-(Aminomethyl)-2-hydroxy-6-(trifluoromethoxy)pyridine-4-carboxylic acid
2-Amino-3-cyano-4-(difluoromethyl)pyridine-6-carboxylic acid
5-Amino-2-chloro-3-(difluoromethyl)pyridine-6-carboxylic acid
4-Amino-3-chloro-2-(difluoromethyl)pyridine-6-carboxylic acid