2-Hydroxy-6-nitro-4-(trifluoromethoxy)pyridine-3-carbonyl chloride
4-(Aminomethyl)-3-hydroxy-5-methoxy-2-(trifluoromethoxy)pyridine
5-(Chloromethyl)-4-hydroxy-3-methoxy-2-(trifluoromethoxy)pyridine
3-(Bromomethyl)-2-hydroxy-5-(trifluoromethoxy)pyridine-6-acetic acid