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