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