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