4-(Bromomethyl)-6-hydroxy-2-(trifluoromethoxy)pyridine-3-carboxylic acid
5-(Aminomethyl)-4-hydroxy-3-(trifluoromethoxy)pyridine-2-acetic acid
2-(Aminomethyl)-5-hydroxy-3-(trifluoromethoxy)pyridine-4-acetic acid
2-(Aminomethyl)-3-hydroxy-5-(trifluoromethoxy)pyridine-6-acetic acid