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