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